i think it's so weird that the girl i am seeing is still a virgin at 21, i inspected her vagina and it seems to be a fact
so what are the odds then she did anal before?
Since you already inspected her vagina, you need to fully inspect her anus.
step 1: have her lay on her belly on the floor
step 2: have her spread her cheeks
step 3: shine a strong flashlight on her bunghole
step 4 : using a hand held magnifying glass inspect her balloon knot for hemorrhoids .
If she has a pleasing pucker hole, and doesn't fart in your face... marry her.