She may very well pass for forty-three / In the dusk with a light behind her!

Dukes were three a penny.

He led his regiment from behind - / He found it less exciting.

Three little maids who, all unwary, / Come from a ladies' seminary.

In enterprise of martial kind / When there was any fighting, / He led his reg'ment from behind / He found it less exciting.

It's not a light switch, that three days after you take it, you're back to doing pushups and running,