Tutoring a kid in fractions, the word “sixths,” keeps coming up, which is a difficult word for me to say, given that I have a slight lisp…

Me: “Sorry, I know I keep mispronouncing it, but it’s hard for me to say with my lisp.”
Kid: “What’s a lisp?”
Me: “It’s a speech impediment. It makes it hard to say certain sounds, like ‘th’ and ‘s.'”
Kid: “Is that why you sometimes spit when you talk?”
Me: “Oh….um. Yes. I actually had convinced myself that no one noticed that.”
Kid: “Oh, I noticed.”
Me: “Yes, clearly.”
Kid: “And, like, I never notice ANYTHING.”
Me: “Great.”
Kid: “Seriously, my mom’s always like ‘Katie, how do you NOT notice that? It’s right in front of you!'”
Me: “I see.”
Kid: “But yeah. Anyway. I noticed the spitting.”