The only way to know if a girl has slept with a lot of guys in the past is to ask her. Oftentimes, a person will open up about their previous sexual experience to their current partner voluntarily.

How can you tell if a girl is sexually active?

The only way that a doctor could tell that youre sexually active is if you have a pelvic or rectal exam scheduled and have recently had a partner ejaculate inside of you during vaginal or anal sex. Semen can live inside the body for up to 5 days, so your doctor may see this during your exam.

What is the average age to lose your virginity?

The average American loses his or her virginity at age 17. Virgins make up 12.3 percent of females and 14.3 percent of males ages 20 to 24.