lately i have been orgasm/ejaculating quite easily, and i dont know why.. when i have sex with my girlfriend it only takes a few thrusts before i am ready to go , but normally this isnt the case. it has only been happening for a week or so (around the time when i started taking Allegra-D 12 hour allergy & congestion) i am wondering if the drug may be the cause of it or there is something else effecting . Today, my penis was literally just resting on her stomach , maybe moving ever so slightly, but i came.. my semen was also kind of watery, so i am wondering if it was maybe just build up that needed to be released? its extremely frustrating, i cant enjoy sex with my girlfriend anymore, and i really need help