Gender, defined by the reproductive organs and distinctive physical features of either gender.
Or
Reproductive act, an act of intercourse, or to put it more bluntly, when you mash the aforementioned reproductive organs together so that the woman, possessing the eggs, may create smaller versions of herself through a painful nine month process.
Alice has a pussy, Jack has a dick. Let's get some steamy animal instinct up in this hizzouse!
( they mash those organs together like arthritic dogs trying to shit. 9 months lather a human in larval stage emerges from Alice's pussy. This larval human is named George and grows up to have sex with another woman).
By CowSex