According to some experienced man: there are many signs / physical characteristics of a girl / woman-me-not a virgin without having to look “into” enough from just outside the Physical:

This is the most powerful, eye near the nose tip towards the entry
Lane temples thin hair & ear not standing.

Arm (near shoulder) is not thin
Edge of the visible parts of the thigh or no longer round
Visible veins in the calf (not Varicose veins)
If the little finger is held straight into a cold sweat uncomfortably
Reply form inclined bottom falls down not
If …