Then a reaction from the Y chromosomes in what will be male children causes those parts to develop differently. Until then, the foetal shape is basically female, complete with vaginal opening and labia. The seam where the proto-vaginal lips fused together can still be seen on the male human perineum and scrotum. A female to male trany who takes male hormones finds that their clitoris not only enlarges but develops in shape to become a perfect miniature penis . There are several other corresponding organs that may at first appear dissimilar between the sexes.
Nipples are perhaps the most obvious example.
Male to female tranys who take female hormones will have breast development much like a normal females. Even without hormone therapy, many men find that their nipples are as capable of erotic pleasure as women's nipples are. There's also the G spot, which you may be surprised to learn is common to both sexes. The glands that develop in normal females behind the clitoris into the Cowpers glands, producing lubricating fluid, are the same glands that develop in normal males into the prostate gland, producing the fluid of semen. Just as the origin and fluids produced by the glands are similar, so are the orgasmic sensations they produce when stimulated.