The 10 boys - funny or not?

Have you heard the one about the girl from Es who took her 10 boys to register with the doctor. The weary-looking receptionist said "Let's start with the eldest, what's his name?" "Wayne" the girl replied. "And what's the next one called?" asked the receptionist. "Oh, he's Wayne too - in fact they're all called Wayne." "Isn't that a bit awkward when you want to call them in for dinner or something?" the receptionist retorted. "Oh, no" said the girl "they just all come at once". "But what if you want to tell them off, what do you do then"? "If I need to do that, I just call them by their surnames" the girl replied.