Kegels, how many?

read a jokey comment about reducing "the box" size by doing this.
but just led me to think, I do them every day, but how many should you do?
I tend to do them 3 times a day, lol, after each meal, 10 to 15 at a time.
which is kinda surreal, as at lunch at work i am sitting there and having conversations whilst doing them! 😂