Way back in the beginnig when DH and I were in college and dating, he worked 3rd shift. I'd stay with him on the weekends because he didn't have to work.
He had a hard time sleeping at night because of his work schedule. I always tried to stay up with him but ended up passing out on the couch.
One night I was asleep on the couch with my feet in DH's lap while he was watching a movie. All of a sudden I woke up, startled. I said, "What was that?" DH died laughing and said "You just machine-gun farted. Go back to sleep."
We were MFEO.
Just to clarify - we aren't the people who like farts or try to out-fart each other or anything. We're just comfortable enough to not be embarassed by them if they happen in each others' presence.