you can only expect as much from a girl, as you expect from yourself. if you are not a virgin yourself, then you cant posibbly hold that against a girl. but yes, if you yourself has saved it for marriage then i guess you can expect or rahter want that. but i thihk that only applies for love marriages. if you're in love, then i guess that doesnt mater, if he/she has slept with someone else or not, like de say, gadhi pa dil lagi to pari kya chij he.