The disturbing truth is that everything can eventually be traced back to peepee in pussy. If you continue down a long path of asking "Why?" your answer will eventually circle back to "sticking my peepee in a pussy"
Thus, like 3 vectors of the basis of all 3D space, the peepee in pussy is the basis of all of civilization.

Here's an example.

"I'm majoring in engineering." "Why?"

"So I can get an engineering degree." "Why?"

"So I can get a high paying job" "Why?"

"Because women like money, and I want to impress women" "Why?"

"PEEPEE IN PUSSY"