Monty Python's Flying Circus, Series 3

Documentary Presenter:
The gastropod is a randy little fellow whose tiny brain scarcely strays from the subject of you-know-what. The randiest of the gastropods is the limpet; this hot-blooded little beast, with its tent-like shell, is always on the job. Its extramarital activities are something startling. Frankly, I don't know how the female limpet finds the time to adhere to the rock face! How am I doing?

Gladys:
Disgusting!

George:
But more interesting!

Documentary Presenter:
Another loose-living gastropod is the periwinkle. This shameless little libertine with its characteristic ventral locomotion is not the marrying kind! "Anywhere, anytime" is its motto, off with the shell and they're at it!

Gladys:
What about the lemmelebrates?

Documentary Presenter:
I'm coming to them. The Great Scallop: This tacky, scrofulous old rapist is second in depravity only to the common clam. This latter is a right whore! A harlot! A cynical, bed-hopping, firm-breasted, Rabelaisian bit of seafood that makes Fanny Hill look like a dead pope! And finally, among the lemmelebrate bivalves, that most depraved of the whole subspecies, the whelk. The whelk is nothing but a homosexual of the worst kind! This gay boy of the gastropods, this queer crustacian, this mincing mollusk, this screaming, prancing, limp-wristed queen of the deep makes me sick!