So now someone who is uptight which we now know means "doesn't find boob jokes funny" negatively impacts CRM? Funny, I always thought it was the PIC's responsiblity to do his/her best to make sure the entire crew operates safely and efficiently. I would like to think a good Captain can accomplish this whether or not the entire crew shares the same point of view and sense of humor. Interesting that the wet blanket is expected to get over herself but, nobody else is.
I See the thing is....the "uptight" people never seem to find themselves called on the carpet. Why? Because if you keep the conversation clean, respectful, and professional, you've got nothing to worry about as there is no bad behavior to report regardless of how tight someone is wound.