When me and my girlfriend are intimate and when my sperm is on her her skin turns red the past 2 times we did it its happened its never happened before I read online and it said she could be allergic but I don't see how when its never happened before when we were intamate. Just the past 2 times. I don't eat nothing different I quit smoking about a week or two ago. But her skin turns red the first time and the 2nd time there were little dots. Like I said I done it before and her skin never turned red.

It can be an allergic reaction and it does happen.

They happen after repeated exposure.

It's probably not your sperm exactly but something in your semen causing the reaction. She'll need to undergo testing with an allergist.

Good luck.