More of an obsessive compultion, whenever somthing touches my hand, i smell it. Maybe it's lotion, maybe it's food residue, maybe it's penis oder from someone who shook my hand, Whatever lingers I smell it. Most of the time It's probably a gross substance on my hand, maybe not, but I need to give it a wiff. This could come from people, animals, household appliances, door nobs, pretty much anything I litteraly could get my hands on.