Im 18 and I used to masturbate by rubbing myself against my bed on my stomach. A month or so ago I noticed a kind of clear discharge from my penis and am wondering if this could be an STD? Im wondering if maybe there is germs on the bed but I am the only peson to do this on there.

I also have a frequent need to urinate but have had this for a few years now way before I ever started to masturbate. I've never had any other sort of sexual contact by the way.