S.H.E.L.T.E.R.'s corruption route utilizes aphrodisiacs on most of the women (early on you're straight up given a choice between love and corruption).
Treasure of Nadia has you help a girl develop an aphrodisiac then go test the results on the women you know.
Lust Epidemic has a mysterious lust-inducing substance causing everyone to get turned on. This one is the first in the series followed by Treasure of Nadia, but I listed it last because ToN is better in pretty much every way and you should try it first.
