Hymen

I need to know that their is still hope for humanity. So please! Tell me you know what exactly The hymen “Look”, is placed, and its function.. because damm i see so many who have zero idea about or learned something complete wrong.
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(Basically the reason for this was because I read some hetero smut and they got the shit wrong...so that’s probely why I like stuff with guys, No hymen you can fuck up)