In general, there's drugs that increase 5-HT signalling can alter sexual desire and function (SSRI-induced hyposexuality being the archetypal example of this). I'm not exactly sure which receptors specifically mediate sexual desire, but I believe 1A, AB, 2A, 2C, are all involved, and have varying effects.
Flibanserin (which is supposed to increase sexual desire in women) is a 1A agonist and 2A antagonist, although there's some question about how useful it actually is. Most psychedelics act as indiscriminate 5-HT agonists, so it's not surprising that there would be *some* change in sexual function.
It may even vary for individual to individual.
Blessings
~ND