"Beaver" joke in PTA's "Licorice Pizza"

In the 2021 movie Licorice Pizza by Paul Thomas Anderson, the main character Gary makes an awkward joke that, as far as I could understand, goes like this (not verbatim):
(on the TV show stage)
Host: How are things going for you, Gary?
Gary: Last week I did three beavers.
Host: You mean Leave it to Beaver?
Gary: Three beavers.
Can someone explain to me as a non-native English speaker and non-American what Gary is referring to here?
Best Answer
"Beaver" is a euphemism for female genitalia. Still used, but more common in the early 70s. I would say using "Leave it to Beaver" (the TV show) in a joke of this nature was about as commonplace as jokes about Uranus.
Pictures about ""Beaver" joke in PTA's "Licorice Pizza""



How I Met Your Mother - Beaver Hand Puppets | FOX Home Entertainment
More answers regarding "Beaver" joke in PTA's "Licorice Pizza"
Answer 2
Continuing from the first answer, he's implying that he had sex three times.
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Eva Elijas, RODNAE Productions, DS stories, DS stories