Rare is the joke or gag or schtick or whatever that makes me laugh no matter how many times I see it. I tend to think that this "letter" written to love columnist Dr. Ruth, a rough on the eyes sex therapist, is nothing but a joke. But a joke I'm not going to ever stop laughing at.
What makes this so brilliant is imagining the poor unfortunate woman as she's writing this letter. I honestly am not even sure that last sentence is supposed to be sarcastic or not. You decide.