I think MDMA is much better, one of the reasons being because it does last much longer than sex. Also, sex is all physical (of course there is also the emotional part, when yore doing it with someone you love, etc etc), but with mdma it can be not sexual at all. I (maybe cause im a girl lol) dont ever think about sex or sexual things when im rolling... I just completely enjoy the purity and amazingness of the drug, and to me thats much better than sex.