LOL.
Actually the joke was a bit different, and kind of a stretch...
Back in the very early days of Dennis Miller's show, he used to always work in something like "If you disagree or have something to say, call us at 1-800-LACTOSE"
Poor man's Dennis Miller has a 976 number, so instead of paying for the calls, he charges for them.
Ahhh, forget it.
It was a real stretch of a joke, yours was funnier.