cannedmilkman wrote:This comic reminded me of a question I had forgotten about until recently.
Everybody accepts that all else being equal, taller fathers have taller daughters and fatter mothers have fatter sons, etc.
But what about genitalia? Does a father with a big penis have a daughter with a big vaginal cavity or is it "tighter" because there are bigger labia? Same question applies in reverse for mothers and their sons.
The cross-sex analogue of the penis is the clitoris; the analogue of the labia minora is the foreskin; the analogue of the labia majora is the scrotum. Insofar as a father's genes for a large penis would influence a daughter, it would promote a larger clitoris; it would have no obvious effect on the vaginal canal.