Fuck no. Strong relationships maybe. This is such a ridiculous standard that every person must get married. You can lead a successful romantic relationship for your whole life, have children, and die all without getting married. What about people that don't believe in marriage or people that are interested in polyamory? This is just another way to brainwash children into thinking they have to fit in a box and not ask of anything different. Sex Ed should focus on the biological aspect and also about pleasure which I'm sure will make a lot of people cringe to think about but the amount of sexual repression kids these days face is overwhelming and unhealthy. Give them a proper outlet and the rest will fall in line.