Is it normal to obsessively run my fingers along/in creases and folds?
My boyfriend has a compulsion when it comes to creases in anything - fabrics, the human body, etc. He feels that he has to run his fingers in/through/along creases, but is a little self-conscious about it sometimes because he hasn't ever heard of anyone else having this compulsion. It doesn't bother me at all, except when he tickles the back of my knee. Regardless, we are curious as to whether this is a fairly common compulsion/habit or if it really is that unheard of.