This is a detail from a print by Thomas Rowlandson titled Quaker In Love:

The full print makes it clear he’s propositioning a woman outside her brothel door while various people watch. Lines of poetry at the bottom are from Charles Dibdin’s The Quaker: A Comic Opera, and introduce a bawdy pun, if we imagine that our man is “upright” in a more earthy sense than Dibdin’s:

I love thee
Would move thee
Of love to be partaker–
Relent then
Consent then
And take an upright Quaker.

Dibdin’s comic opera Quaker, on the other hand, seems respectable enough:

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