The Risks of Monogamy

I've always been a little uncomfortable with the way that social scientists talk about sexual activity and sexual risk. I understand that when you are trying to make change at the level of a population making generalizations and grouping people is a necessity. And I suppose it's a lot to ask people to be constantly qualifying what they are saying in order to make it more precise, but the alternative is talking in a way that may be statistically accurate, but fails to reflect the lives we live...