I've noticed in the last couple of years that around 2 out of every 5 women I have intercourse with bleed during intercourse at some point or another. They don't bleed every time, nor does it seem to be related to if they are either on, getting ready to start, or just finished her period. It does seem to happen slightly more often during certain positions. Have other men had similar experiences? To the women, what has caused you to bleed during sex? Is there any thing I'm doing 'wrong' that might be causing this?