I have a question what can cause a mans penis to become irritated. We had sex about a week ago and the next day he messaged me and said the tip of his penis was red and irritated but it did not burn when he peeed. We are both clean because I went in last week for my annual pap and std check and all came back negative for everything this was a few days before we had sex. I admit he was rough during sex and I was laying next to him with pants on as well and might have rubbed up against him a few times which might have caused irritation as well. I admit he drank Koran of vodka and orange juice and cranberry and vodka the previous night. He also was laying down naked without a sheet on the bed face down and is a 250 pound man so it could be from maybe swearing as well. What do you guys think?