It's been 3 days that I had red small pimples on the head of penis, which now only a few stayed and have one blister on head of penis now, they are not itchy and not.painful until i touch them and it doesnt hurt when i pee. I only have one sexual partner been with her for 5 years and this is the first time it has happen, she also seems to have pimples on the inner wall of her vagina.