Conversation with the Teenager

I was pulling out of the school carpark.

Teenager : Mom, that's A.

Me : I know.

T : She has really skinny legs.

M : I have noticed that.

T : She's not like B and M. They have a nice figure.

M (surprised) : People usually want to be skinny like her.

T : MK and I were asking ourselves once how she manages to shit with such a very small butt (he used 2 hands to demonstrate the size)...

M : ...

T : I mean, shit is usually this big (used 2 fingers to show the circumference)...

M : You boys are really gross! (and silly, I was thinking)

T : But you know what? She's a really nice girl. Really...