The Antoninos

"Men grow addicted to me on short order. Even dignified elderly men are overcome with boyish ardor.

Pelorat laughed. I wouldn't count on much boyish ardor, Bliss, but if I had it I could do worse than have it on your account, I think.

Bliss said, Oh, don't discount your boyish ardor. I work wonders".

Foundation's Edge, Isaac Asimov