Don't shy away from the topic of condoms, as this unglamorous contraceptive is one of the most effective methods of preventing sexually-transmitted diseases (STDs) and unplanned pregnancies. There tends to be an unfair stigma against discussing condoms, let alone using them.
Once, while attending a talk on sexual health, a condom was passed around for the participants to get a closer look. To my amusement, one horrified participant barely touched the new unused sample condom before tossing it on, sending it flying to the ground. It turns out that the participant had never touched a condom before, new or used, and was surprised to feel an oily film on the sample.