Hello dear
Understand your concern
According to public knowledge, sex without any difficulty and pain means loss of virginity due to
hymen rupture.
But hymen rupture is not absolute sign of loss of virginity.
I generally give following explanation in this type of case:
I know you are thinking that my virginity has been lost earlier as sex has been done without any difficulty.
But sexual intercourse without difficulty and pain may be possible if hymen had rupture due to activity other than sex.
Following are these activity that lead to rupture of hymen:
Horse riding, biking/riding of two wheeler, sit astride, mountain climbing, tree climbing etc.
I had never sex with anybody and there is possibility of rupture of hymen due to above activity.
Hope I gave you better explanation.
All the best
Best regards
Dr. Sagar