Consider it a simulation game, a first person shooter game. About every man faced this situation when outside.
For girls: it's still a simulation game also. If you had a tool, you would probably do it in public toilets too.
As you go on higher levels, there will be **** all over the place! Beware!
To mute the music, there's a button on the HUD. Instructions are there too but I'll list here.
SHIFT (hold): super spreader;
MOUSE: point and shoot;