Bert feels silly.
So, which makes you feel sillier: going around with a purple hand or going to the beach in winter clothing?
This sketch reminds me of the time I scratched my cornea, the treatment for which involved wearing an eyepatch for a day. And when I say "an eyepatch," I mean a piece of white gauze that was attached to my face with surgical tape. I was hoping to be able to stay home that day and not be seen by anyone outside the family, so people wouldn't stare at me and ask me questions, but there was some sort of supper at church that night and my mom made me go.
And you know what? It wasn't really a big deal. There was one person there who had had a similar injury and commiserated with me, which made me feel a little better, but other than that, no one even paid much attention to it one way or the other.
So who cares if you have a purple hand, Bert? It's only as big a deal as you make of it.