Never do 1. f2-f3

unless black mouseslips twice
That would be a very dumb move when you have a chance to checkmate.

But I always open with 1.f3 Here's why.
I see, but it's not a 100% guarantee that black will do those moves.
The only time I play f3 in the opening is if I'm playing against the Caro-Kann. The fantasy variation is great.
Never start a game of chess with f2-f3, and here's why: