i told my fiance everything about my past and he did same too
but now u guys are married, you can still tell him, even if its not all some, it not a bad idea.
Not a good idea my dear, if there were many men before him, psychologically it will affect his views about you, he may pretend that all is well but someday somehow he will use it against you, so the best bet is, keep your mouth shut even in marriage.