if i see lingerie,especially panties - that belong to a neighbour or wife/gf of a mate, i have to pick them up and rub them in my face while sniffing.
several times i have put panties in my pocket or put them on under my clothes -then when i get home i use them to wank off..
sometimes,if i think i can get enough time - i will use the persons toilet and have a wank down the lavvy while rubbing there panties in my face. i get the bonus of being aroused again as soon as i go back down stairs to continue chatting with friends, because when i look at them - i think of what i just did with his partners panties. its great to be able to see the woman who's lingerie i've used or kept...