What is 'IT'?

'It' is so individual...
Even subjective...
Are my opinions 'it' worthy?
Does IT have consequences?  Come with conditions?  Hold reservations?  Require maintenance?  Any prejudices?  Limitations?
What is the deal with 'It'?

If I go for 'it'...and catch 'it', can I keep 'it'?
Will 'it' ever end?  Run away?  Hide?  Diminish?  Disappear?  Explode?  Implode?  Rust?  Melt?  Does 'IT' ever hurt?  Burn?  Require surgery?
Involve doctors, lawyers or judges?

What
is
'IT'
???

What do I get out 'it'?