point being, chemical enhancers really don't exist. there are a couple of substances that fake sexual enhancement by greatly increasing
blood flow to the sexual organs (they're vasodilators) but this is not pleasurable for women - it's bloody painful. the only way to relieve the congestion is to orgasm, and who wants to have one for that reason? it's not very complimentary to the partner, after all, and says a lot about people who feel they need to sneak this crap into drinks and dinners and whatnot.
if you enjoy sex and you enjoy your partner or partners or whatever and you take the time and energy to research what's going on, then you'll have no problems whatsoever.