I got a great joke for you. So they told me no lollygagging. Hey, I can't help it that their throats are so small! Get it?
I can't believe you said that.
What's the big deal? I'm just kidding and having fun here.
I don't think it's right to joke about someone who's been sexually assaulted. I'm lucky that I don't know anyone who's been raped, and I can't imagine how horrifying the experience must be for them. You like to tell jokes, and that's fine, but you can have fun without resorting to material like this.
I'm just being me.
Other people who've experienced sexual abuse -- reportedly 20% of all women -- would find that joke disgusting. They'd be even more appalled to hear you taking pride in being the kind of person who enjoys that kind of "humor."