I say fa fa what? Fao!
The hymen in most women is like a doughnut with a hole with in the middle, and as a lady approaches puberty and even after, it becomes elastic, so elastic sometimes that sex can occur without tearing
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The young lady will not see her periods, because the hymen prevents it from flowing out, so it pools in the vagina and forms a hematocolpos
This is however rare. Very rare
A virgin is one who has had no sexual intercourse before.
And yes it is possible to not bleed during the first sexual encounter
This is a risky sexual behavior and carries with it heightened risks including contracting HIV faster.