Tenting is when a guy in underwear has a hardon. Most when it is a loose pair of boxers and the penis pushes the boxers out to make a shape of a tent. i have a mad underwear fetish, i get a semi just seeing a guys waistband over his trousers/jeans. i would get semis even buying underwear. Anyway, i especially love a guy (who im about to have.sex with) wear loose boxers so i can give him a BJ when still wearing his boxers. any one else like this or want to share any stories?