My words to the OP were mostly about understanding that his values are personal to him and his needs are about compatibility. I asked him to worry more about "compatibility" than morals.
I agree, I feel pendulum has swung too much the other direction in the last 30 years. Does this mean that all the children growing up now have less an inherit ability to know right from wrong just because they may have had more sexual partners than someone of a prior generation?
For what its worth, I find that most women, regardless of their past, are more likely to not stray when in a committed relationship as opposed to men in a comparable situation. Also, women usually stray for different reasons than men.
I do not agree with the view that "you have to get laid in high school". But the environment, as it is, makes it such that those who do not feel very strongly about other's sexual past. Its a complex set of problems.