Jerry the Humorless Short Guy

Jerry is a very short person, a four footer,
He is a nice guy, charming, sweet as sugar,
He is educated, smart, intelligent, a good talker,
Once a week he meets with friends to play soccer,
He likes to cook, have a drink, works a steady job,
A friendly nice guy, the complete opposite of a snob,
But, when it comes to sense of humor, there is none,
Jerry has no idea what humor is, he misses all the fun,
What is it that has killed his humor, made it all dead?
Is it because he is short that the jokes go over his head?