Meth tends to get a bit perverted. Orgasm is great, but yeah, problems achieving it and staying hard. Makes girls into it, but they haven't been my type in my experience. And it encourages meth use, so I tend to steer clear now. Similar problems with other stimulants like a-pvp, etc.
GHB is good, even better when combined with meth.
Alcohol I am not a fan of. It lowers standards (beer goggles), makes conversation/romance dull/dumb, the sex is less memorable, we're usually too fucked up, and can be numbing so that its not pleasurable anyway. Small amounts can be a good lubricant, but too much tends to result in bad experiences for me and her.
Steroids and a bodybuilding lifestyle made me incredibly horny and increased the attention I would get.
But I can become very irritable and they have other risks associated.
Also it felt a bit annoying to have my chest/arms so bulky.
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Low dose psychedelics (LSD/Phenethylamines) would be good.
MDMA solo as well as in combination with a few things.
Mephedrone made me quite horny, but I missed the pre-ban days.
^^^Never had sex on these though.^^^