Eating a girl out from behind. She had an amazing body (still does) and it was awesome. Then without saying anything, she starts pushing my face away. I am very paranoid/worried about doing anything to make my partner uncomfortable, so I just pulled a few inches away from her butt and started to ask "Are you ok?" But then she let out a huge fart right as I was inhaling to speak. My nasal passages were open and this fart was forceful enough that I felt the hot, heavy gas hit the back of my throat and sink down. Then a few microseconds later, the smell hit me; full-on shit grade, permeating my sinuses. I starting choking and gagging and dry heaved a bunch. My girlfriend was so horrified she started crying. This was like 2 months into our relationship so she thought I was going to leave her, but as soon as the nausea wore off, I just started laughing because the situation was so funny. We bring it up all the time now and still laugh.