I'm thinking of putting stickers on the professors briefcase.
Why are you going to do that?
The challenge of doing something out of the ordinary is exciting to me.
You want to challenge yourself to do something different. Adding stickers to the professor's briefcase might make him mad/ He will ask you to either remove them properly or pay for a new suitcase!
I will not do it. I'm not sure what I was thinking earlier.
I'm glad you changed your mind. It wasn't worth it.