No intent at all to start a debate here... but I actually disagree. If you had been a fly on the wall to witness the card game held inside a mountain cabin a few weeks ago during our church "Men's Fishing Trip" retreat where I was a participant along with two of our pastors and several other cool guys.... to witness the *constant* juvenile humor.... you would disagree too.
As a new Christian I will say this.... the man I was before would think the average Christian generally stoic as well if only because I'm no longer able to laugh or enjoy jokes about important moral issues.