Whacking off to porn..Normal. Pissing your pants is not! Do you like do this on purpose? Jeeze..14, and already needs some Depends.

Urolagnia (also known as urophilia) is a sexual fetish with a focus on urine and urination. People with urolagnia often like to urinate in public, or urinate on, or be urinated on by other people, and may drink the urine. The consumption of urine is urophagia. Some like to watch others doing these things. These activities are often described by the euphemisms "golden showers" or "watersports"
Wikipedia Urolagnia

I'm 32 now, and started piss-wanking when I was about 11. Those of us who enjoy pissing thru our hard cocks while we jack or fuck or whatever are a good-sized minority. Whether str8, bi, or queer. Most major cities have clubs that cater for people like us. To do it, or to meet others into the same. Try tasting it sometime, specially if you practice auto-fellatio. More info, email feisal32@msn.com.
Or maybe you're just going through a phase? Best wet wishes, anyway.