Chinawizard here. They do, but people are getting married later and later. At 28 I suppose I'm close to the point at which being single would be considered 'odd,' most of my cousins are in their early twenties and are already married, though without children (our fertility rate is almost Japan-tier, we'll definitely need immigration to keep the country functional in about two or three decades).
Actual wizards, as mentioned earlier, are either like me and exceptionally rare, perhaps one-in-a-million, or are just too financially inept to afford to support a succubus, which is somewhat more common, especially among the lowest segments of society.
As for virginity, I'm under the impression that it's more or less normal to remain a virgin up until getting into a serious relationship during or after university. However, chastity is becoming less and less important as the country becomes richer and more liberal (and high schools loosen their academic standards), and I'm pretty sure we'll have party sluts and chads in a decade or two.
Socially there's definitely a pressure to get married and start a family, while in my case my parents aren't in a position to push, the workplace culture is somewhat similar to other East Asian countries where if you remain single into your 30s/40s you'll be viewed as somewhat untrustworthy and irresponsible. I've applied to domestic companies for middle management positions before and although I was more than qualified in terms of education and work experience they always passed over me for candidates with families (perhaps age and cultural considerations have a factor in this as well, though, because as an overseas born returnee they might see me as less able to integrate with the rest of the company).