Woman goes to her doctor to say that her husband has lost his appetite for sex. The doctor says, "Well, I really need to examine him, I can't diagnose anything without him being here."
The woman says, "Oh, but doctor, there's no way I'll ever get him to come and see you - he refuses to accept that he has a problem!"
The doctor says, "Well, it's unethical but there are some new tablets that are being trialled. If it got back to the Medical Council that I had issued these to you without your husband's knowledge I'd be struck off. So keep quiet about this!" And he gives her a small bottle of pills. "Come back in a week and tell me how things went."
A week later the woman comes back. The doctor asks her, "Are you happy with the results?"
"Well, yes and no," she says. "I knew he would refuse to take any tablets because he doesn't think he has a problem, so when he wasn't looking I popped one into his coffee. He drank it then got a funny look on his face, then he grabbed me by the wrist, pushed me face down onto the table, ripped off my knickers and did me doggy-style."
"Sounds like they had the desired effect," says the doctor. "But you say you're not entirely happy?"
"Well, no," says the woman. "We're now barred from every Starbucks in the world."