Gretta Carlsson in one of her best, if not the best scenes. The other contender is the one with the Bogas Brothers. She was a Milf before even the term existed. Look at that Blue dress in "Mermaid Material" so cool in the late 80s, early 90s. She would cum very easily, you could make her cum very quickly. She would cum if you licked her out, she would cum if you fucked her. In this classic she cums enough for everyone but for example watch @10.25 how her pc muscle tightens preparing her body for orgasm and she cries out "Oh Fuck" in recognition when she feels this. Then @ 10.34, 9 seconds later her cunt starts contracting in orgasm as Steed keeps his cock sliding in and out her through out. One delicious aspect of her is that she licked a cock in her mouth whilst cumming. In the end Steed shoots first into her mouth but watch as she turns quickly to Michaels whose climax is seconds behind she gobbles him and sucks him off while still with Steed's cum in her mouth, she sucks him to his ejaculation mixing both of their creams.