I always flush before I finish peeing
Why do you flush before peeing instead of after?
I get a sensation I have something to flush.
Flushing the toilet before peeing is something unique about you. You need to flush afterwards to make sure it all goes down the toilet. There will still be pee in there if you don't do this.
No, I'm going to flush before I finish peeing.
It's not very polite to not flush after using toilet. If you want you can flush before you finish peeing but make sure to flush it afterwards too.