Here's another autograph rhyme that my mother taught me from her childhood or youth:

Don't make love by the garden gate.
Love may be blind
But the neighbors ain't.

**

And here's a very common autograph rhyme that I may have learned from my mother or picked up somewhere else along the way:

Roses are red
Violets are blue
Sugar is sweet
And so are You.

[notice that back in the 1950s and 1960s we didn't use letters as substitutes for words in this rhyme. Nowadays, if that rhyme is used at all, a lot of times it's probably written like this:

Roses R red
Violets R blue
Sugar is Sweet
And so are U.