I don't think anyone is suggesting you look like a fool. I have had birds for nearly 50 years. I have seen some weird things. There is no way it can be said that the male layed the egg, because it wasn't observed only that an odd egg was found. I have seen females mount other females which is usually a dominance issue. Maybe your he is actually a she. There have been females that try to crow and act more like a male. I'm not trying to be rude and if want to think your male layed the egg, that is ok, but there could be other explanations but not obvious. A chicken having the sex chromosomes ZW is female, and a chicken having the sex chromosomes ZZ is male. I don't know for sure but it has been noted in humans that once in a great while a person XX is female and XY is male and an off spring may have an extra gene. XXY (as an example). Maybe that can also apply to chickens. In chickens it's the female that determines the sex of the chick, Z male and W female but all get a copy of the Z. In humans the males determine the sex, XY and give the baby an X for the females and Y for the males. Maybe your bird is a ZZW so it has both the male and female gene? Just a thought.