I have developed a reddish, rash-like irritation on the left side of my scrtoum and shaft of my penis, leading half way up the left side. It occured during vaginal intercourse with my girl friend. When I showed immediatly after, the affected area felt sensitive, the way that a sun burn feels when water hits it. I put aloe on it and it did not hurt anymore. However, this occurred two days ago and now it is peeling and continues to look red. The skin is shiny and smooth, almost like a burn, but painless. It does not itch, even though the skin is peeling. I believe that the cause f the irritation came from the fact that immediately prior to intercourse, my girl friend removed a tampon that she used that day, though her flow was light. We also used a water based lubricant during sex. My question is, could the combination of lube with the remnants of chemicals present on the tampon have cause a chemical burn of irritation? The tampon was unscented and has a card board, not plastic, applicator. We have had sex after she has used tampons in the past with no ill effects. Is this bad practice because of chemical interactions between the tampon and vagina?