This species of humanoids has a peculiar way of reproducing.
Instead of the usual physical intercourse between a male and a female, followed by the sperm cell merging with the egg cell to generate the embryo, they reproduce following something similar to what sponges, corals or some anemophile trees like pines do.
The males periodically diffuse in the air a cloud of "pollen", which then is carried by the wind until it lands on a surface. If the surface is the suitable appendix of a female, fecundation takes place.
I have the following constrains:
- the female, though not controlling the fertility period, can control whether to expose or not expose the appendix.
- though technically possible, 1 on 1 fecundation is extremely disdained in their cultures. "You know who your father is" is one of the worst insults one can pronounce in all their languages.
- It's common that males gather together to spread their pollen around. Willing females sometimes gather together, too, in a suitable place according to the wind.
- Their embryo development follows the same general lines of homo sapiens
The problem I have is that I am not finding a way to reconcile this way of reproduction with physical pleasure for both sexes. In homo sapiens the nerves form before the sexual differentiation, so the basic sensitivity is already present in the areas which will become either a penis or a clitoris. But for these humanoids the female seems to have no use for sensitivity in the sexual organs. Simultaneity of the pleasure is not in scope.
What mechanism can I use to have both sexes experience physical pleasure which can be coherent with the embryo's development?