Seeing how many people get triggered by the "no virgin" thing, I find that in 99.9% of the games there is absolutely no reason for the developer to mention that a character is not a virgin.
You don't have to make every woman in your game universe a virgin, just simply do not mention any former sexual partners, don't do moronic comparisons of your character's sexual performance to former partners and so on. I think such information adds absolutely no value to most stories out there, and serves no other purpose than to agitate people who are sensitive to it.
If your story is not dependent on a character not being a virgin, just don't mention sexual history, it's that easy! There is rarely an opportunity where you can satisfy people by not doing anything, but this is one such opportunity... in this case, not wasting letters on describing former sexual conduct!
A good example of this is University of Problems. You get to screw real nymphos. At no point do they say this was "the best sex they've ever had", no moronic "it's been a while", absolutely no implication or comparison is made between the sex scene you see, and former sex they might have (definitely) had in the past. You know they aren't virgins, but they are not spelling it out. And that's already enough.