Is it normal for your testicle to sting when you wipe it with alcohol or any substance containing alcohol like cologne, antiseptic etc. It only happens on the left side testis. I could not find a sore or open cut. I also notice a very slight yellow stain on left side of my underwear. No pain or general discomfort. My wife is my only sexual partner and our sex is very occasional (she is 57 yrs old and I am 49).