Honestly, I think the stigma extends only so far as people may think you will become clingy.
If the person wants a long term relationship with you, or you show sufficient maturity, i don't think most people give a fuck. That said, i'm mid 20's and still have contact with young women 18+, and despite their maturity, i may consider avoiding sexual experiences if they turned out virgin and i didn't have a serious interest in them. But that's because i'd have more of an issue with myself for debasing that experience rather than 'ew virgin'. I lost it at 22ish to a one night stand, then went through a period of several short-long term relationships. Sex is sex is sex. It's the shit in between that's really interesting.
If you're just walking down the street talking to people or shouting it from the rooftops nobody's going to give a fuck either although you may catch some strange looks.
Yeah, it's not really an issue. There is the whole alpha thing, and 'pure untouched woman' bit too, but i think we've moved on from 16th century feudalism (or so i hope).