Noooooooo...he's not talking about Jenny. It's about Benjamin Franklin Plumbing, 866/867-5309. WBAP advertises them very frequently. There's probably more info on wbap.com under their advertisers link.
Anybody remember when Tutone's record company activated 867-5309 numbers in major cities (including Dallas---Plano, to be exact) when that song came out in 1982? You would call it and, as they put it, "get a special message from Jenny."
The one spot I can't understand is Choctaw Casinos. It doesn't play well on AM. For months, I thought the jingle was saying "Hot stuff" (not the Donna Summer version, mind you.)