It doesn't determine whether or not you're a virgin any more than your toes do. If you're having P in V sex, pregnancy is possible the first time.
A virgin is someone who's never had sex but it's not quite as simple as it seems. A lot of people think that having penis-in-vagina sex for the first time is how
How To Have Sex? I'm A Virgin, Help! (My First Time Having Sex!) I'm pretty sure this is a question that most virgins (not in a bad way) ask
Are you a virgin, or are you sleeping with a virgin? If so, check out these sex positions to try during the first time. Sex Positions for Virgins. Is It Your First Time Having Sex? Study Up On These Positions ASAP. Aly Walansky.
However, it's not true. Even if it is a virgin's first time having vaginal intercourse, it doesn't mean that they have never been exposed to an STD.