Derek-
The one exception I'd say to your point about "10s with 10s, etc" is in the case of money. Frequently women that are 10s will marry/reproduce with men that are, at most, a 4 but have a ton of money.
I'm not saying all women are like this, but enough of them are that it needs to be factored in. Of course, this could easily be explained in evolutionary terms of needed a provider while they are pregnant.
I've seen stats that claim as many as 1 in 10 children are not related to their "dad" and that they are the product of one of your illicit meetings with an alpha male. I have no idea how accurate that is, but DNA testing should be standard on all live births IMO.