It is because we are hardwired to procreate as much as possible. We may have evolved enough to think rationally, but we are all still animals and that's what animals do.
Men can have a menstrual cycle - if they have female reproductive organs and don't take hormones to suppress their menstrual cycles. Men thus can experience menstrual symptoms, so only trans men can experience this and not cis men who do not have female reproductive organs.
That would be the Gonads.
Gay people have reproductive organs. Having reproductive organs has nothing to do with being gay or straight.
because men do not have the reproductive organs capable of bearing the child. beyond that, i have no idea why
pollen
Androecium and gynoecium are the reproductive organs in a flower.
A roosters reproductive organs are internal.
in the reproductive system
Flowers actually are the reproductive organs of plants.
Flowers actually are the reproductive organs of plants.
external reproductive organs can be distinguished by the 12th week of development
Most reptiles have internal reproductive organs.