So here’s the real reason that rape jokes are troubled territory -
Because rape victims say so.
They get to say that. They get to feel that way. On this, they get to set the cultural rules.
It’s not about right or wrong, or logic versus emotion, or arguments of over sensitivity or hypocrisy - you have the free speech to make whatever jokes you want or talk about rape in whatever way you feel is illuminating. But they get to be upset about it. And call you on it. And be hurt by it.
But consider this:
You get to not be a rape victim.
They, however, are not afforded that luxury. Ever again.