A couple of my friends didn't get the joke when I told it to them.
Its a groaner, Look at the words.
It sounds like a couple of old fellas comparing operations - having a circumcions - its not the most comfortable thing for the male species but look at their ages. 5 years old.
The first one says 'I had it done right after I was born, I couldn't walk for a year'.
Of course he couldn't - it usually takes a baby 12 months to learn how to walk.
Nothing to do with the op at all lol