I usually don't have problems when I run test either (like I am now), but right now in Week 4 of 75mg tren ED and 600mg enanth weekly, I'm having trouble reaching orgasm with my girlfriend. Maybe it is mental, but I've noticed my cardio abilities are drastically reduced during sex, and I get easily worn out after 25 minutes or so. Maybe its a prolactin increase, because usually I haven't had as much as a problem while running dostinex in the past. I'll give it another week or two and see what happens when I drop the tren in Week 7.