Virginity

A Virgin is someone who's never had a sex. But it's not a quite as simple as it seems. That's because sex means different things to different people, so virginity can mean different things too. The definition of virginity is complicated, and it's really up to you decide what you believe.
What is hymen
The hymen is a thin, fleshy tissue that's located at the opening of vagina.
Many people think the hymen totally covers the opening of the vagina until it's stretched open, but that's not usually the case. Most of the time, hymens naturally have a hole big enough for period blood to come out for you to use tampons comfortably. Some women are born with so little hymenal tissue that it seems like they don't have a hymen at all. In rare cases, women have hymen that cover the entire vaginal opening or the hole in their hymen is very small they need to see a gynecologist for a minor procedures to remove the extra tissue. Just like other parts of the body, Hymens are a little different for every women.
Hymen can be stretched open the first time have vaginal sex, which might cause some pain or bleeding. But this does not happen to everyone, and there are other ways that a hymen can be stretched open, riding a bike, doing sports or putting something in your vagina (likes a tampons, fingers or sex toys)  once your hymen is stretched open it can't grow back.
Some people believe that you're not a Virgin if your hymen is stretched open. But having a hymen and being a Virgin are not the same thing.
Some women are born with hymens that are naturally open. And many others activities besides sex can stretch your Hymen. So you can't tell if someone has had a sex by the way their Hymen looks or feels.
Bleeding after your first sexual intercourse may be a Symptom of losing your virginity, but not every woman bleeds and that doesn't mean she wasn't a Virgin.