I am male. 32 Years Old.  For a few days now I have had this random stinging pain in my urethra about half an inch inside and it seems random or if I squeeze my shaft.  It does not hurt when I pee though.  I have not had sex in about 4 years so I don't believe I picked up an STD.  The fact that it is random and doesn't react when I pee is is weird.  Any thoughts?