The asshole in the past

If I had a time machine, I’d go back in time to when I was 20 years old and slap myself silly for being such an asshole.
Of course, back then I was such an asshole, I’d shoot anybody that threatened me. So I’d have shot anyone slapping me around.
Right. Wear a bulletproof vest?
No. I’d shoot the dude in the face. A bulletproof vest doesn’t cover the face.
Wait… shooting the dude in the face?
The dude is me.
Well, future me.
Maybe I shouldn’t do the time machine thing.
And just leave that asshole in the past.