Best part about having sex with your grandma is that you can fuck her bareback and cum in her pussy and there's very little chance of her getting pregnant and a very great chance that you'll both enjoy it very much.
i never fucked my grandma. one died when i was five and the other i was ten or so. that one though had a sexual history, from whoring and porn pics and movies to a stable normal life to her later years cohabiting with her girlfriend lesbian lover. i just remember staying at her house with my sisters and we played parcheesi in our underwear, including her and her companion