Drinking into unconsciousness

I'm asking this openly and curiously. What is the mindset of someone who goes out and drinks until they are either knocked out or even just totally lacking judgment? I like drinking but I've never gotten drunk and don't believe I would. But IF I would, I'd only do it in a totally safe environment, meaning I'd know that there was another non-drinking person whom I totally trusted that would make sure I stay safe. It's beyond me what allows someone to just pass over that responsibility for their safety to... the universe? What is the thinking? Or is there none?