Why?

[lissasmomma1]

My Bantam RIR roo was caught sitting on eggs today. Is that A normal thing, or is my bird a weirdo? This is baby girl (my roo. Didn't know he was A roo before he was named)

 

[sloanbychoice]

Yes,
Sometimes boys will find a nest, make a nest, sit on eggs, etc. to show the ladies the best places to lay, and to protect eggs.

 

[FunClucks]

That's a sign of a great roo, actually. If he's nice to you, you have a keeper!

This article by Shadrach has some awesome insights into rooster behavior.

https://www.backyardchickens.com/ar...-not-about-the-egg-it’s-an-escort-call.74386/