Healing Factor / Hangnails

Something I have begun noticing B how 
I'm not really healing like I used to 
Before, my cuts & bruises disappeared 
N a day or two, never leaving a scar 
So I called it my "Healing Factor" 
Like Wolverine and Deadpool have 
Though, I don't have it anymore 

Lately, little knicks, like hangnails 
Have been sticking around, for weeks 
Maybe my metabolism is slowing down 
Maybe just getting old, like Logan 
So, maybe I should watch that movie 
I did Hurt my self, not too long ago 
And didn't the trailer use that song?