It seems fairly obvious that a sadist must justify the sadism - "the victim deserves it for xxx reason." Even if the justification is absurd, it seems (to me) needful for the sadist to proceed without qualms.

I think she is being punished and I think her "crime" is a simple, common one: having a greater sexual apatite/need than the man. The mere existence of the song is justified by that. I've many times heard the notion that referring to another being "oversexed" just means having a greater apatite than the speaker. Makes sense to me.

Dick: I can only go by my perception of others' perceptions. The venue I sang Sea Crab in was a friendly, singer-songwriter place and appropriate laughter from them was evident. I'm pretty sure BGW would have been greeted less kindly for the reason of tending towards hate crime. Maybe I'm projecting, though. I could take a survey there on this next month, if you like. It would hardly be a valid sampling of US reactions, but if you like...