Science shows that people at young ages try to make lots of jokes, be funny, and get lots of attention because of the lack of love in their home life. No love from parents or siblings can be scarring, so they turn to others for the attention and love they need. So when someone who you feel makes too many jokes, or seems to just always want to be at the center of attention, think about what their life is like when no one else is around but family.
Take me for instance. Yes, I do make a lot of jokes all the time. And the unconscious reasoning to that is also lack of love from family members. My parents hate me, my sister hates me, and everyone else I meet at my school.
Lack of love can do things that people don't even realize. They could go so long without care, they lose the ability to care for others.