Ingratitude.

Last night young Cupid lost his way, And came to me to find it. He'd been a truant all the day, But didn't seem to mind it.

I put him in a hansom then For home, and feed the cabby; But my reward was what most men Would call extremely shabby.

He got his bow and arrows out, And pierced my heart, nor tarried, But drove away ere I could shout, "Great Heavens, Cupe, I'm married!"