Ah well. I guess we should just agree to disagree here.
Well, it is of particular interest to
me, as my tax dollars pay for the results of contemporary sexual mores as expressed by illegitimate births, to name just one effect.
If we were to quantify the costs of illegitimacy (one result of contemporary sexual mores), I think that the stodgy ol' Victorians would come out on top, as it were. (Costs could be sifted into tax dollars, crime rates due to bastardy, etc., so as to make them comparable.)
On the other side of the ledger we could look at, say, incarceration of sexual deviants and other metrics where an ethos of sexual continence may not have such positive outcomes.