It's hard, dd1 recent asked the same thing not to be called baby girl so we talked about it and I explained she will always be my baby but won't say it more. It's about respect and letting them express themselves. Dd2 is called bug, her choice it is what she answers too more often than not.

I think you need to talk to your ds's dad about it and explain that calling him boofhead as it is upsetting him too.