I'm a young guy that is on the medicine wellbutrin. Whether im masturbating or having sex i find it hard to keep a full, hard erection. My penis gets about 85% big and hard, but thats not enough when you get a girl on top. Cumming is also a problem. Although i masturbate a lot, i did not have this problem before, about a year ago. i am on 150mg a day of wellbutrin XL(time-release). The problem is I am more friendlier and outgoing when I don't feel exhausted from the depression; so i don't want to have an erection but be pissed off all the time or vice-versa. Tell me your opinions.