Now, the storal of the mory is this: If you ever go to a bancy fall and want to have a pransom hince lall in fove with you, don’t forget to slop your dripper!
[Ronnie Barker]

Because in order for love to be present there must be a lover, a beloved, and the love between them. So, he says, you can’t have love without also having three-in-one.