Existential Dilemma

Hi there

Can anyone help me explain this advert. Maybe I’m stupid, but I am missing the existentialism behind the dilemma?

youtube.com/watch?v=-HK5AI6L … ed&search=

Thanks

Is it because the toilet in itself in unintelligible to the individual who can’t tell what side is the front because he sees everything as relative to himself when in fact the toilet may have a front and back?

There is no actual philosophy in the delima per se. The humor comes from the guy saying something that the other guy would normally say. That’s all.