I have a simple test for this kind of thing. Change the victim from female to male and see if it's still funny.

For example, there's a parody that goes

Rudolph, with your gun so bright, won't you shoot my wife tonight?

Change that to this:

Rudolph, with your gun so bright, won't you shoot my SON tonight?

Suddenly it's sickening. Well, it was sickening before.