They do in high school and your early 20's. It was so easy to get laid back then.
Is that true? It gets harder past that?
That's just the sweet spot of accessibility, free time, alcohol, poor judgement and hormones. The only thing holding you back is your dedication and drive.
Doesn't mean you can't recreate that in your future life (by your choice in career and hobbies), but the likelihood isn't too great.
Honestly, it's not something to aspire to. It's an empty pursuit of chasing highs.