In terms of victim impact, adultery can be one of the most devastating events to have to endure, far worse than property theft and for some worse than physical assault. Victim impact should weigh heavily on what we consider "crimes" and if so what about adulery?

I don't believe it should be prosecuted under criminal law, but rather under contract law. When someone commits adultery they are violating a marriage contract, and as such, the other spouse should get absolute preferential treatment when divying up wealth and children in the divorce.

Adultery is illegal for members of the military, and should, I think, stay that way.