I'm going to complain about a stinky coworker
Oh no, why are you going to complain about a stinky coworker?
The guy just smells funny and it's difficult because I have to sit next to him.
I see your point, but talking about your coworker behind his back isn't nice. You should tell him about his body odor issues in private.
I was joking, but I just want him to wash his ass.
Your feelings are valid and you having issues with his smell is a bummer. I'm glad you were joking about going behind his back, but it wouldn't be wrong of you to tell him directly, though it might be an awkward conversation.