I am a 19 year old guy, weigh 173 lb, and no illnesses/medication. I had sex recently, but I also started using imodium on the back of my penis to get rid of genital warts from hpv. After both having sex and starting to use imodium, I got this big red rash on the left side of my testicles. It never itches, but it burns when I touch it. Just recently, pus started surfacing. The skin seemed to have peeled incedibly fast, but it's also exactly where my penis would rest after applying the medication and sleeping with it. Could this be due to the imodium rubbing off from the penis to the sensitive skin of the testicles or is it some kind of std? No unsafe sex, but rubbing of parts. Thanks.