The Semi-Senior

Dude, you need to get a life, some semi-senior said tapping me on the shoulder while I was typing a mail to my mother about the maid. Maybe I imagined it, but I think his paws stuck on my shoulder for longer than normal.
I turned back and that is the sort of question you don't have an immediate answer to. I wish social talk at work was like opinions for clients. I could then say, I will get back to you and think about a cool answer in a few minutes and tell him.
So all I said was yeah man, what to do.
He said, it's about what you want, and he grasped my shoulder, and his one finger touched that part of the below-neck area that is not covered, you know, like above the first button.
I felt shy, but that was a confused moment, I am so angry I could break his face now.