All the way through high school and college ('82 through '89), I trolled my friends, claiming in a deadpan tone that there had been a scientific study proving that we homo sapiens love the smell of our own farts. Little did I suspect that reality would prove my leg-pull true!!!!! :D
http://www.huffingtonpost.co.uk/2014/11/11/why-do-we-like-the-smell-of-our-own-farts_n_6137990.html