I see where Dear is going with this, but I think you should try not to tell him, unless it seems obvious he'll find out another way. Were you somewhere that included friends you both know? If you were, then yeah tell him. Just make it really casual, not like "a big talk." If it seems really unlikely he'll find out from someone else, I wouldn't mention it. Yeah, you're exclusive now, but it's still the beginning. I don't think it's time to get all relationship talky and discussing everything--you still need to play it cool. Don't add extra stress to a non-issue.

I say dont kiss and tell. No need to complicate things when they are just beginning.

what he doesn't know can't hurt him. plus, this is a new relationship so you don't know how he might react. i say leave it in the past and move on

Move on. That kiss meant nothing, so stop wasting time thinking about it.

Move on, if you want to be with this guy, be with him and forget about all over guys from the past.

I don't think he necessarily needs to know. You had the 'talk' after this happened- sometimes couples don't even have this talk and just assume they should be exclusive from the beginning (then I would share at some point to be honest). He will probably be upset about it regardless if he finds out , so since it didn't mean much (?), I wouldn't get him anxious over it- especially if you really like this guy and want this to go somewhere.

Since you guys weren't exclusive, I think that this is something you can leave in the past. Your current guy doesn't need to know about it.

You guys were not in a committed relationship when you kissed your dancing partner. You were just out having a good time. I say it's best not to tell him.

I think that would just unnecessarily complicate things! you didn't really do anything wrong, you guys weren't exclusive and it's not like you had sex with this other guy! I say just forget about it!

In my mind, anything that happened before the RDT (Relationship Defining Talk), especially something as trivial as a kiss while out dancing, doesn't need to be talked or cared about, and I wouldn't be upset if the guy who I just started dating had dome something similar - or even worse.

Don't tell, it was just a kiss. Just make sure you don't do it now.

Oh girl... don't worry about it... don't even tell him....If the relationship was not plainly stated as closed and exclusive then no harm no foul.... the thing now is to move on in a new relationship and trust and respect one another enough to remain monogamous.

No that isn't cheating! Don't tell I can't believe your even thinking about it!

I totally disagree with Dear Sugar - we are talking about a kiss right? Don't confuse your boyfriend with this stuff, if you are never going to see this dude again and it didn't matter - just move on.

Why are you actually worrying about this? Don't bother saying anything. Why unnecessarily bruise his ego or make him wonder about you. You said so yourself you weren't mutually exclusive well now that you are its time to stop kissing other guys. Keep your mouth shut and enjoy your new relationship.

It meant nothing and it happened before you were exclusive so it doesn't count. If you mention it, it would cause a whole lot of trouble. Don't make this a 'what if' relationship. Forget it and move on.

Not cheating in my book.

I wouldn't tell him... you didn't have the talk yet so it's not his business. it was just a kiss.

I say dont tell. YOu werent exclusive at the time you owed him nothing and vice versa. But from now own keep you lips to yourself

what you do B4 you make it official is your deal not his.

Worst advice ever. Do not tell him. You were not exclusive at the time, so it is none of his business. What exactly does "not exclusive" even mean if innocently kissing another guy is wrong, and then going and telling him?? And what will be the benefit of telling him, anyway? Honesty is NOT always the best policy, and now is one of those times.

No way Jose, keep your mouth shut and if it ever comes up say "no, it was before we were exclusive; in fact, we had just started talking." and let that be the end of it.

You and he had the talk last night. That means effective last night you are exclusive. But up until then, you were both free agents and anything you did was your business. It was also only a kiss, so I say not worth mentioning. It has NO bearing on where you and he are beginning today.

Don't tell him. You guys weren't serious yet, and all you did was kiss another person. Is it really worth ruining a potentially great relationship over something that small and insignificant. If the kiss had happened AFTER "the talk" then it would be a different story, but since you guys were not exclusive, it's not really anyone else's business.

You did not cheat. There is no need to tell.

If you were going to fess up, you should have done it during the talk. Unless the kiss was on his manly bits or involved some heavy breathing, I'd leave it in the past.

Also, you lose any right to freak if you find out he did something before the talk. Just a heads up. If you'd freak, then fess up now and tell him you expect the same.

No you shouldn't say anything. You just had the talk last night. Past is past do you think he is going to give you the play by play up to last night. I doubt it.

I agree - it was not cheating and I wouldn't tell him. It was before "the talk" and it really isn't worth dragging up. It was a simple kiss and nothing more.

I disagree with sugar and agree with most everyone here. It is not cheating and you should not tell. It would certainly cause more harm than good to say btw, I kissed another guy when we were not exclusive. Moreover, do you want to go down that road with him? You were not exclusive -he and you had a right to do what you pleased with the opposite sex. Do you want him to tell you if he kissed one or 10 others when you were not exclusive? Be happy you have started a real relationship now and do not worry about it.

You did not cheat since ya'll were not yet exclusive. I do think you should discuss it with him, so that if it ever does come out, you can't be blamed for lying by omission.

i have actually been in this situation, and i guess you could say am currently in it now. i've never felt the need to tell my current boyfriend i made out with someone before the DTR. i wouldn't want to hurt him, and we had a "don't ask, don't tell" policy. although i don't agree with this sort of policy if you are in a committed relationship, i agree that what is in the past should stay there. and as dear mentioned, if i put myself in his shoes, i still wouldn't want to know! it doesn't matter who he has kissed in the past - he is with me now and that's the only thing i care about.

I dont think you cheated because the relationship had not been defined.

I would tell, but that's because I'm a fan of total honesty. It's the sort of thing that will probably upset him now, but if it somehow slips out much later, would upset him much more. (Remember the episode of Friends where Monica wanted to have sex with Joey, not Chandler, and he finds out after they're engaged? Not a perfect comparison, but still valid, I think.)