According to new research, it's usually a man who says, "I love you" first. Yes, somebody actually studied this. The researchers reasoned that in general women have a more realistic view of relationships, and are thus, less likely to get carried away early on. On average, it takes a man about seven months to fall in love, while it takes cautious women a whole eight months. If you've ever been in love, how long did it take before you knew it?