I find sex to be best on:
1. Mescaline, but it has to be at the right part of the trip (peak or post-peak to avoid nausea). (1) It causes very intensified tactile sensations making sex feel better (2) it makes you so horny that even the very thought of sex can give one an instant erection and (3) the serotonin/dopamine rush during and after sex is incredibly intensified. My girlfriend agrees this is the best sex drug. During orgasm, I have hallucinated a beautiful blue glow that surround both our bodies and that was the craziest orgasm ever.
2. Mushrooms, but the dose has to be right. If the dose is too high, you will have never ending thoughts that will distract you and make you forget what you are even doing. The sexual pleasure is highly intensified and it makes you feel like two wild animals fucking. Again the dose must be right or it will not work. I have had sex for 2 hours on mushrooms before and it was some of the wildest sex I've ever had. During orgasm, I have hallucinated crazy bursts and hues of colors with my eyes close. But 3/4 of the time you will never reach orgasm, so Mescaline still wins.
3. Passionflower (not really a drug) but a nice supplement for sleeplessness. I find that it makes me 10x hornier than sober and improves performance to levels you would not believe. No enhanced tactile senses like shrooms or mesc though.
4. Alcohol, but not blackout. Makes me hornier, not tactile.
5. Cannabis, if you are comfortable with the person. Don't smoke much if its super high in THC though, it can make you unmotivated haha.
These drugs I cannot have sex on:
1. Adderall, ritalin, vyvanse
2. Kratom. It literally makes indifferent towards sex. It makes me so content and satisfied with whatever situation is happening, I just feel like "what do I need sex for?"