I think Anti-depressants, MDMA, LSD and Magic Mushrooms all have a similar effect. They can all potentially increase sex drive but they impair your ability to get an erection. Some of it might have to do with body temp. I've found when I am overheating, or have a fever, that I tend to lose my erections much more easily than normal. I haven't tried LSD or MDMA but Mushrooms and antidepressants both increase my sex drive but I can't for the life of me get a hard boner when I'm on them, they both also make me feel very hot. The few times I was able to get hard on mushrooms, I got so hot and sweaty that I soon lost my erection, the same thing happens when I'm running a high fever and try to masturbate. Although it's still slightly less difficult than keeping it up, than on mushrooms. Normally I have no problems getting hard.