Why do i deliberately wet my bed?

I am 22 and have been able to control my bodily functions for as long as i can remember. However i purposefully wet my bed fortnightly whilst i'm awake (of course) and do other things after while i am all wet. My mattress stinks and so does my room. I get real kick out of smelling my mattress. Is there something seriously wrong with me because i told somebody this in real life and they wouldn't believe i wasn't joking?