One of my best mate's is a real male slut. He is 32 years old with a great body, and a great set of equipment. I have only seen him naked in the shower at the gym, where I would guess his uncut dick hangs limp at around 5 inches and his balls which are definitely on the large size hang low and heavy. We often talk about sex and he has often told me in great detail about the women he has fucked, of which there have been many...and I do mean many. We have never had any sexual contact as he is 'very straight', although I have often fantasized about him in various ways which I am sure you can all imagine. He occasionally stays overnight at my place, and more than not with a woman is in tow, so I have heard him fucking their brains out many times. About a year ago he left a pair of his underwear at my house. I had seen him wearing them many times. They were black Ralph Loren Polo trunks and I found them by the side of the bed when he left my house. The idea that he had been wearing them was a huge turn on, and I couldn't stop myself sitting on the side of the bed and wanking off into them covering them in thick white spunk. Anyway I put them in the wash and as he never mentioned them I hung onto them and started wearing them occasionally. The first few times I put them on I usually ended up having a wank, but after a while I just started wearing them whenever I felt horny and the knowledge that my dick and balls were exactly where my mates had been has been a huge turn on ever since. Occasionally I even get a hard on while wearing them, and to be honest I am past the age where I walk around with an uncontrollable stiffie. I must point out I do not have an underwear fetish, but these shorts, belonging to my 'very straight' friend are a major turn on. Has anyone else had any similar experience.