This You-Tube link was sent to me today by a friend and church member - http://www.youtube.com/embed/D2_c81Nnsc0. It speaks to the issue of thoughtless and careless interruptions and distractions caused by cell 'phones.
I think it uses humour well to encourage people to be thoughtful and considerate; I think humour is well used to teach us profound and challenging truths as well as matters of social niceties.
Humour generally gives us perspective and a willingness to be appropriately self-deprecating.
As one preacher told me, "I get their mouths open with a laugh and then ram the truth down as quickly as I can".
We never have record of Jesus laughing or smiling but surely he must have done so, yes?
To be made in the image of God is surely to have within us a gift of humour which should be nourished, expressed though (and this is hard for some of us) without sarcasm or too much cynicism.
Talking with a couple to be married, we readily agreed that laughter was an important factor in healthy and growing relationships though, hopefully, laughing at the same time and not at each other!