The first joke is factual. It concerns a delightful adolescent habit in the USA that consists of wearing a so-called purity ring and making a pledge of sexual abstinence up until one's marriage.
A survey has just revealed that serious young folk who have decided to make such a pledge and wear such a ring end up having premarital sex just as readily as everybody else. In other words, the purity rings and pledges are mere symbols of wishful thinking. But here's the joke... which would be funny, were it not distressing for those concerned. Whenever young people in this virginal category happen to fall into the screwing trap, they're likely to be confronted with more sexual problems than the others, simply because—like bad boy scouts who haven't respected their Be Prepared motto—they're overwhelmed by the consequences of sudden unexpected passion. They've never envisaged using condoms, which makes them perfect candidates for unplanned pregnancies and sexually transmitted diseases.
My second joke is a nice little Xmas tale.
A young girl has just been examined by her doctor (or physician, as they say in the States).
DOCTOR: Well, young lady, I have good news for you and your male companion. In about eight months' time, you'll be the parents of...
GIRL: Excuse me for interrupting, Doctor, but I don't have a male companion.
DOCTOR: Let me put it another way. You'll be able to inform your most recent male partner that you're now...
GIRL: I'm sorry to correct you, Doctor, but I've never been involved with a male partner. I've never had any kind of relationship whatsoever with males.
DOCTOR: Then you've surely been receiving treatment in artificial insemination from a gynecologist...
GIRL: I'm sorry, Doctor, but I have no idea what you're talking about.
The doctor walks to the window, opens it and starts staring silently up at the sky.
DOCTOR: The first and last time this happened, long ago, a fabulous star appeared in the sky. This time, I don't want to miss it.