I'm not inventing any scuse, and as a matter of fact, I don't torture insect for fun, it's just an empirical question based on the lack of nociceptors in the arthropoda phylum, and the answer is not as simple as you put it smartypants.
That's interesting, to sorta answer I find that the answer, as living organisms, is that, like a fire, consuming is the optimal way of existing, a cell "lives" in the sense that its internal "factories" continue working and consuming things turning them into other things and its objective in life is finding other "things" to turn into other "things".
So more cells started working together, because so their transforming process would be more productive, and that's you; basically, a cooperations of factories, consuming and transforming, and thats the universe.
The universe is alive in the sense that it wants to consume, to explode, to go on, it's like a match that when ignited, continues to burn all the O2 'till there is none.
"To live" means "to consume", but as a biology student, my most concerning question is "Where does the will to reproduce fall into this mindset?"
I can't quite be sure of anything, why would a virus want to replicate its DNA? Why would a moth turn into adulthood to mate, and then die starving because it doensn't have a digestive system anymore?
And that's withouth mentioning human awareness, wich is a bizarre and mind blowing turn of events.