I like my favorite sentence: I haven't showered in a week
What do you like about that sentence?
I have been telling it to my friend for a few days on a weekly basis.
You shouldn't say disgusting things to people. They probably don't appreciate it, and it might ruin your friendship.
Too bad I don't care about anyone's feelings. It's not like anyone cares about mine.
If you don't think people care about your feelings, you should communicate that to them instead of trying to disgust them. Friendships take communication and maturity.