I enjoy going in for a hug, gazing into the husbands eyes, smiling lovingly, and then... letting one sneak out. The displeasure on his face when the smell arrives always brings joy to a dull day.
I also enjoy farting near strangers, at a bus stop, or train station, and then slinking away, trying not to giggle and give the game away.
Farting and then looking around, disgusted, as if trying to 'see' who did it, even though I know it was me.
And... yoga. Someone always farts, and I can't help but roar with laughter, and I quite enjoy that other people bristle and give me their 'that's inappropriate' face, which humours me greatly.
My father-in-law was the best. He'd sit down and suddenly, it was like somebody had dropped a cannister of mustard gas. He could clear a room in seconds. He'd sit there, feigning ignorance, but if you caught his eye you knew he too thought it amusing that people were gagging and their eyes were watering.
I once listed a jar of farts on ebay, for a joke. And, yes, somebody bought them. 99p. Hahaha.