Is it ok to have just ice cream for supper?

Is it ok to have just ice cream for supper?
Phew! a great day’s writing, but I get lost in my characters and forget the normal things in life, like shopping, cooking, brushing my hair and maintaining the basics.
Last night, I had ice cream for supper… a whole pot!
Is that a bad thing? Is there an ice cream police? Who made these rules anyway?
I’m supposed to be a grown up, but moving past fifty I seem to be receding into childhood and forming the ’what the fuck, I could go under a bus tomorrow’ kind of attitude.
Heavens… I’ll be skateboarding next.  At least I’m not doing that ‘poke a man and go’ thing… that would get me in a whole heap of trouble... (smile).