My Boyfriend on 3 years who just turned 31 and I'm 23 Can't keep an erection during sex.For the past 6 months I have caught him masturbating all the time.He even masturbates in bed while I'm next to him sleeping.We haen't had sex in over a month because he cant get or keep an erection.Also when he does keep an erection he cannot get off .But I don't understand why he can get off while masturbating.He watches porn but does not have to watch porn to get off.. We have talked about it over and over and nothing gets resovled. He has even gone to the doctor for this so called problem but the doctor says everything is fine... This problem is making me not want to be with him anymore and I cant take all these emotions anymore! HELP!