I am 23 female still virgin. my bf also 23 years old, every time when i ask him he said he is virgin. but i want to prove that he is virgin or not ?

Sorry No proof!!': There is no method or test that can prove male virginity. You just have to believe him.

No markers: There are no physical markers that can prove this for a male. If they have or have had genital warts, gonorrhea, genital herpes, or syphilis you would assume prior sexual contact, but without these there is no way to prove/disprove a males claim of virginity.If you find yourself obsessing over the issue it is likely a sign you need to take it slow. If he's the one, he will wait.