Hi..the thing i am scared about is most probably very normal but anyways i am nervous...last night i noticed a pimple like thing at the tip on my glans beside the urine opening,it is not apparent in the flaccid state and becomes visible only on erection..i mastubate a lot and have had oral sex only once just a few days back (never any other form of sex)..my girlfriend is very healthy.. i cant tell if the pimple like thing appeared after or before oral sex..please help thank