Why mindless behavior is so funny:
1. The are boys boys are the one who most likely do the most out of boys and girls
2. They have been to so many places done or seen so many things they could easily make an inside joke either about a joke or what they seen
3. There fans make it so they always have at least something to joke about by the way we react when we see mindless behavior for the first time or even for multiple times.
4.they are in a group so of course they cant just have a boring conversation.
5. Its cant of like a back up plan to intertan their fans (mostly for the fact they are ladies that enjoy men that can hold a conversation and keep them laughing.)