...I've always thought that Rob Reiner giving his mom that line in When Harry Met Salley was priceless.

I mean, when you think of it?
So often most of our character and learning to deal with stuff, including what's funny and what is not?
-comes from our Mom's.
We wouldn't exist if it weren't for them, and we certainly wouldn't be able to cope for much, either.

I found out a few years ago, from my Step-Dad that there were only two people who could get my mom laughing,
so much that he knew instantly who it was on the phone with her,
me and her eldest brother (who passed a couple of years ago.)

So it looks like the mantle has been passed to me, and nine times out of ten, I'll be on the cel, and it starts with
'...Mom, you're not going to believe this...' and then, no matter where I'm standin?
I'll just roll the stories to her, and the comedic timing is spot on. She's a character, has amazing wisdom with regard to people, and is smarter than most anyone I've met.
We cover everything from World events, politics, family, how the neighborhood is doing, -to her gardens, (the lady is an amazing gardener.)

(She even was here two winters ago, (she was really touched when the kids at the Supermarket carried her groceries to the car... just shocked...)
So now she'll be like '..okay now where in Fresno are you...?'
-cause I brought her around the joint first hand.'

So, the best thing you can do is to get your mom to genuninely laugh,
and to establish yer mom as the deliverer of one of the greatst straight punch lines in the history of the planet?
Beautiful, Beautiful thing that goes on forever.