I'm going to drink out of my coworker's world's greatest dad mug
Why are you going to drink out of their mug?
I just feel like it, no real reason.
Don't you have your own mug to drink out of? I'm sure your coworker will hate it if you use their personal mug and they probably think it's disgusting to share cups like that. You should just use your own mug.
I don't give a damn if he hates me because of it. Life is hard and cold. You have to try or you fail. I'm going to use his mug.
I think you're overreacting a little bit here. All I'm saying is that you should buy your own mug to drink out of.