Period sex is one of those topics that really divides people. Some don't care about the potential mess at all, while others are disgusted by the very thought of. Jun 15, - Your period will be heavier if you have sex on your period. A lot of women think that having sex while on their period will make them bleed more, but that's false. The contractions that you have during orgasm might push some more blood out, but it won't make your period heavier or longer.