Who's da Man?!

Here's a typical example of how a perfectly sensible adult conversation can become permanently derailed by a toddler:

Laura: ....He said that I charge less than what he did teaching ESL in Vietnam. I said that's what happens in a small town with few international students and a lot of qualified teachers. The price drops way down.
Me: Yes, that's supply and demand.
Sophia: No, he's a woman!
(And just like that, end of serious conversation.)