He's 8/9 years old, would he really understand it enough to feel disgusted? He might find it a little weird at first but when Fang and Iggy explain it he'd probably be alright with it.
If anyone is going to have a problem it'll be Max.
I haven't used the word kinky in forever...Did you know rain that evaporates before it hits the ground is called Virga? Isn't that totally random info that is just cool to know?