Please do yourself a favor and behold this marvelous overdubbed German sex comedy from the 70s, '2069: A Sex Odyssey.' It features a ship full of alien babes who arrive on earth in order to collect some male spermatozoa "the precious seed without which the mightiest civilization withers and dies." Also, they've never seen a bra before. As the uploader notes, "Some of the worst dubbing on Earth though it is tough to dub a German word that has seventy-eight syllables in it."
Best: "How do we get the seed?"
"We rub for it."