40 years ago while in the Army I had frequent unprotected sex. One day my scrotum seemed sore and dry then in about a day a layer or two of the dried skin peeled off leaving my scrotum moist and very sore with what looked like new skin that really wasn't ready to be exposed. In about 7 days it was healed and looked normal again. Haven't had a blister or sore spot since. Herpes?