Pee just about every time I'm in water- shower, bath, pool, etc.
I love plucking hairs and get so excited when it's time to clean dh's ear hair out again but I never pluck my eyebrows (they're so blonde they're practically invisible).
I really like farting and think it's funny when anybody does it.
I eat leftovers from a week past.
I bite my fingernails every time I'm waiting in line to check in at the airport and spit them on the ground- even though I secretly think someone could pick them up and get my DNA for some sinister purpose like cloning me!
If there is a knife on the board I'll use it even if I don't remember what I used it for previously (always wash meat knives immediately, don't worry! )
I don't really think any of it is that gross, though, just normal!