I think what he meant was that if you and your partner lose virginity to each other, and stay in a monogamous relationship, you won't catch an STD (actually if all people tried to do it for a 100 years or so, STDs would be eradicated, don't you think?)
I'd like to repeat the experiment in the world where such behaviour (approaching and being blunt about what you want) is a norm, and where women aren't taught that they'll be sluts if they have sex on the first date