I have 3-day-old boxers with a very large amount of sperm. They smell amazingly intense :) I'm a naughty bear. I work physically and go to the gym, which is why my underwear has an extremely intense smell. Combined with the remains of piss, ecculate and sperm, which are in really impressive quantities - I give an extraordinary experience :) I usually wear underwear for two or three days. Of course there is a lot of sperm :) I wear briefs, boxers and jackstraps, number of days of wear, sperm or piss to be determined :)