Like Grandad Like Homer!

Took a photo of an old apron I had as a present from one of my children a few years ago. What prompted me to do that was the other photo that Joanne (D-in-Law) took last night at Prezzo's where we went for Julia's birthday meal (26 today, where does it go eh!).
For some reason they always saw some similarity between myself and Homer Simpson, can't see it myself and have no idea where the idea comes from.