Joke 1: "Why aren't you eating more?"

Mother: I'm not eating anymore because I am too full.
Father: I would eat more, but I don't like plates.

My family visited this weekend, and my dad made this witty remark over dinner as we finished our meal. We were eating at a nearby panAsian restaurant, our table consisting of myself, my recently turned 26 year old brother, my parents (both in their 50s), my aunt (in her late 50s), my grandfather (about 85) and his wife (also in her late 70s/80s). When my dad said this, I immediately giggled, my brother smiled, and my mother let out a hearty laugh. At the end of the table, my aunt who is a little slow when it comes to jokes laughed out loud when my mother retold it in spanish for my grandpa and his wife (who then laughed as well). This joke wasn't one that would be particularly offensive to anyone and was easy to cross cultural and linguistic borders. Although my grandfather--who has lived in the US for many years, but grew up in Mexico and speaks very little English--did not understand it at first, a simple translation had him laughing, too. The humor here is clearly along the vein of saying something that does not meet our expectations.