meself -

if a younger woman tells me I'm too old for her, can I take her to court?

Yes, but under Federal (US) law the only "harm" you can claim is actual loss of income so your case would be quite useless unless you derive significant earnings from sleeping with women (or others). The requirement that you prove your losses would likely necessitate identifying at least some of the others you've slept with, who paid you for the service, and almost certainly at least one of that horde would sue you for some minor damage to their reputation under other (libel?) laws.

(And in most places proving that you were paid would subject you to criminal prosecution under local laws.)

It would seem rather dangerous in your case. I'd recommend you just accept the loss in income and concentrate on the more beautiful mature women, since they're certainly plentiful enough. But that's just a friendly suggestion since IANAL.

John