Well.. He's not wrong!

I'm pretty sure that makes 4 types of people

They are different topics, right? So it keeps the number to two.

but since there are two possible topics in the universe you gotta use them both

@bethorien.. thank you! Hahaha. But by the power of statistics that would mean there are at least 6 types of people... 2 who are dirty minded, 2 who have 'clean' thoughts or 2 that see both