text: why does almost everytime after i have sex with my girlfriend, my penis gets irritated if i don't wash quick? i mention that i don't need suggestions like: she's fucks with someone else and that she is ill because of that because i tell you 100% she is not(i was thinking more that i have an alergy to some fluids in her vagina, maybe, if it is possible)  by irritated i understand that the skin gets red(exagerated) and after one day(if i don't wash) my skin dries and in about a week it falls... but in this time the skin is very rough and sometimes injuries occure if i masturbate. i mention that i recently had all analysis done, and that it appears that i'm healthy, although the skin on my hands is allmost all the time asper(rough). it may be something that she is eating. you may be allergic to it. maybe an over the counter drug, or some kind of fish. does something similar happen to you when you kiss her, or if she goes down on you? it is most likely just something she is taking that is not good for you. not that she is cheating. have you both had std tests?