Those people are idiots and you need a new job with smarter coworkers. You aren't old enough for sex in my view and aren't ready. Most people don't know their spouse when they are 18.
You will go away for college or work, get away from your home environment and try a new way to live and you will feel more comfortable there, without the whole world knowing your life story, and without people who have seen you grow up watching, to become who you are meant to be as an adult man.
When you meet a woman you have feelings for, you will feel that way because you connect with her on an emotional level. She will probably be a virgin too, and you will figure it out together.
If you feel you don't know enough about sex, you can read and learn without doing it.