I see a many bios on dating sites stating that, I'm not sure what they mean, a comedian type, jokester or ? I can't recall being able to do that on a first meeting.
I actually haven't seen many profiles stating that they're looking for someone who can make them laugh, but I know that's often rated high on the list of desirable qualities — right between "shaved back" and "no funky smells" (okay, I made that last part up).
These women probably don't want to be around someone who takes everything so serious because they have to put up with all that while at work. If they chose to be around someone, they probably would chose someone fun loving and fun to be with rather than a person who seems limiting. I, personally, have made up my mind that I have much better things to do than to waste my time and temperment on someone who is not interesting and not fun. They only mention it in their dating sites because most men of a certain age want someone to take care of them rather than be a companion.