It still strikes me, how would u know if a guy is virgin or not, unlike girls you just know... Or if a guy says he's virgin its a big deal and if a girl says she's a virgin it something wonderful.

You can tell in both genders only in the bed room. You can speculate beforehand.
A kiss with a virgin girl most times exposes her inexperience and virgin guys make so many dating mistakes you can assume quickly.
One trick disarms people's assessments of an inexperienced virgin: lying. Inexperienced men can lie their way into a lady's pants and inexperienced women can lie a man into their pants.