Does weed have negative effects on testosterone, ambition, etc.? I am a casual weekend smoker but this past week I've been smoking every single day. I feel so drained and everything feels kind of bland. Yesterday, I smoked a fuck ton and when I was coming down, I left my friends house to go to my girlfriend's. When we went to have sex, the after-high kicked in and I couldn't stay hard. It's as if I had no energy to do anything. I'm 18, so I know I don't have ED or anything but it just felt weird. Could weed be causing this and these feelings?