Frisk has got her mum to shield her from such things.

[And Quark is a boy, and Kesara is... okay, not someone who he thinks should be exposed to "Do Your Balls Hang Low?". But she's weirdly self-sufficient, and smart and worldly enough to back out if she doesn't think she can handle it.]

Here, you must have some of your own, Doctor. Willing to share? You can take it to private if they're filthy enough.