I didn’t start boogie boarding until my mid-60s. I think having grandchildren visit was what got me to try it, but after a few rides on good breakers I no longer needed the kids as an excuse. Now I’m a great grandmother and I'm as good at it as they are.
I also embarrass them by letting out a yell as I ride all the way in to shore.
My "rebel yell" started spontaneously. I simply couldn’t keep myself from vocalizing my delight even if it attracted the attention of waders, and if an onlooker happened to comment I would tell them it was such a thrill to be able to do this at 71 that keeping quiet wasn’t an option.