Funny anecdotes etc for a wedding speech please

I have been asked to MC my dear friends Wedding.
Now, I have plenty of public speaking experience and understand the format I should follow.
But what I do have some difficulty with is, is injecting spontaneous humour in a public engagement like this.
I could very easily 'tailor' any appropriate jokes or stories that any of you might share and would be most appreciative for the ideas.

Thank you all kindly

Michael.

If you love something, sit it free, If it comes back, it was, & always shall be, yours. If it never returns, it was never yours to begin with If it just sits in your room, messes up your stuff, eats your food, uses the telephone, takes your money, & never behaves as if you set it free in the first place, you either married it or gave birth to it.

The key to a long and happy marriage it to remember those three little words; You're right dear!