What is the grossest habit your sexual partner has while you are getting it on with each other?

My first sexual partner used to wait until he was buried inside of me hilt-deep, and we would be going at it, only for him to repeatedly burp and fart (really loud sloppy sounding farts that resembled something close to him almost shitting himself), then when he finally cum, he wouldn't moan or grunt or anything to give any indication of having done so, but every time without fail he would instead use the excuse that he had a major cramp in his thigh, lower leg, ankle, or foot, then demand I climb off him (he was obese so the only way we could have sex was if I was on top) so as he could get the cramping to stop, then he would rush to the bathroom and have another massive farting session or have a full on shit.