As was stated above, MORALS are individual and personal judgements about right and wrong, which are often influenced by larger societal values.
And VALUES are the societal/cultural majority judgement about right and wrong. These change slowly over time and again as stated above, are influenced by the cultures that comprise the larger society (their religious beliefs, laws that are currently held, etc...)
In terms of sex ed...
Society may value (unspoken or not) that men are manly men (not as much now as in the past) and because the cultural idea about manliness is that one is sexually driven--it is less taboo for a man to be very sexually active.
A man might hold the moral conviction that he should only have sex when he is married, which may be somewhat counter culture in the larger society, but may be something valued within the christian community (a cultural group).
conversely for women, society tends to value (unspoken or not) that women be more virginal, pure, and chaste (not as much now as in the past) and therefore it is more taboo for a woman to be very sexually active (she will be called a slut, when the aforementioned man would likely not)
A woman might hold a moral conviction that it is not a problem at all for people to have sex with each other as long as they are being responsible (or are in love, or are planning be monogamous, or whatever). She may have developed this moral stance as a product of being raised by a community that held more liberal values or, of course for an entirely different reason.
neither are necessarily absolute. And the development and evolution of values within a culture is far more interesting and complicated than I am able to present here.
I hope that helps or is at least in plain language