I like to smell my sister-in-law’s dirty p******. Though it doesn’t happen very often, I try to do it whenever I can. The first time I did it was when she was barely 19 years old. She and my wife left the apartment for a bit, and she had just taken off a pair of orange cotton p******, before she got in the shower. They were still warm and they smelled heavenly! I buried my nose into the gusset and masturbated like never before! I’ve done it several times since then, but that was the best.