Most Helpful Guy
It's not really about the number. It's about how you treat sex. Somebody who has had ten boyfriends between 16 and 30 could have slept with ten different guys and still demonstrate that she sees sex as something to be shared between people who have a romantic emotional connection. On the other hand, a girl who has sex with ten different guys in a month because it makes her feel good about herself shows she values sex quite differently.
In any case, there's no need to berate somebody for their choice. It *is* their choice, and really it has nothing to do with you until you're confronted with the choice to be with her or not.
Most Helpful Girl
People need to stop slut shaming. It's 2015. A guy can apparently have sex all he wants and get encouraged by his friends and found "sexy" while girls are degraded and called whores. Sleeping with other people doesn't make a slut, sluts don't exist, only to people who take other's business personally for whatever damn reason.