Of course, you can get horny because it is warm and relaxing and you have time to fantasize. But, I'd leave it alone. I don't think a guy should tan his dick. Isn't the skin on your nuts really thin and delicate? Don't people think tan lines are kinda sexy? Anyhow, once I tanned in the middle of winter and that day was wearing really heavy flannel boxers. After a couple of minutes, I was dying and sweating my balls off! I slipped them off and made a makeshift "diaper" out of the little towel they gave me. However, unbeknownst to me, I left a moon shape opening on my ass exposed. I got a terrible burn on my "never seen the light of day" ass. I couldn't sit comfortably for a couple of days.