LovelaceF,

You are saying that sleeping aroud and being a rapist are quantitatively but not qualitatively different.

Nothing can be further from the truth.

Our legal system correctly reflects the fact that nothing can be further from the truth by leaving consensual sexual acts within the domain of private behavior into which the government needs not to intervene, while making forced sex against somebody's will a punishable criminal offense.

The sex part that is present in sleeping around and rape does not make them in any way comparable. The modern view of rape emphasizes the force and abuse of physical power that the perpetrator has over the victim.

It is important to have the ability to tell those two apart. OP, if your parents show lack of understanding that no amount of sleeping around would make your bf a criminal/rapist, you may want to try to explain that to the parents. This has nothing to do with values but everything to do with the ability to identify and isolate the core element of the crime called rape.