Mumble slaps Gloria's ass a few times towards the end of "Boogie Wonderland" ("No, it's 'MAMBO', OH!") and then her grinding against him. Definitely◊ not subtle.◊
When Gloria starts singing "Boogie Wonderland", accompanied by Mumble's tapping, the beginning is pretty reminding of an orgasm with Gloria singing slowly at first, then faster and faster as the song and background chant intensifies, until she ends up shouting "Yes!" and panting heavily. Just wow.
Curse Cut Short: Lovelace, in response to the barrage of questions Mumble is asking him, claims to hear the "mystic beings" telling him to tell Mumble to "Go f... - forth and multiply".