“Trust me, after you have sex you’re going to want to experience it with other people.”
Think of kissing. If you’re over the age of 17, you’ve probably had a few relationships that involved kissing. Now, think back to when you were dating somebody that you were totally crazy about. Think about all the times you were kissing them. Did you ever think “I really want to experience this kissing with other people”? Does that sentiment even come close to what you feel when you think back on those memories? Of course not. More likely, you could picture yourself kissing that person and only that person for the rest of your life, if it hadn’t all gone bad (assuming you broke up).