I've noticed this a few times over the years, if I use something rubber based that someone has used before me I find it sticky.
I bought a car once, the steering wheel was sticky until i'd owned it a while, cleaning it didn't seem to help.
Things at work with rubber handles, sticky.
I lent someone a computer mouse and got it back the other day, the scrollwheel is sticky/tacky.
Is this normal or have I got weird skin?