Talking about your sexually transmitted diseases with your sexual partner may be difficult and awkward. Not only can it seem accusatory and make you look non-trusting, it's pretty gross and embarrassing. It can make you feel dirty, scared and sexually unattractive.
While some people like to discuss their concerns before engaging in intercourse, others prefer to only talk about STD's when and only if they have a reason to bring it up. This is not highly recommended.
Oftentimes people also feel that a lover might be covering up something embarrassing about their sexual past. Do you think that you would ever demand to see your partner's health records/STD test results?