I can only describe this sensation from a male perspective, but I can assure you, ladies, that the same things that turn you on knowing you’ve been inseminated, possibly impregnated, are very similar to the primal pleasures we as men experience knowing that exact same thing.
It’s a very satisfying feeling to know that you’ve completed your most basic and necessary task to ensure the survival of your species. It goes far beyond the simplicity of the act itself. The orgasm and all the other subsequent pleasures are only half of the equation. As a man its mostly about claiming a healthy and fertile female as the vessel in which to plant my seed and knowing that my line will continue through the mixing of my genetic material with hers…bonding and combining us both forever in the resulting offspring.