Roosters sometimes have strong nesting instincts. They do have investment in the eggs since they fertilize them, so they want to see the ladies get comfortable in a nest to lay those eggs. My roosters enjoy hopping into a nest even if a hen isn't interested.
Some rooster will even help raise the chicks, and will even sit on a broody nest while the broody takes a break.
Some rooster will even help raise the chicks, and will even sit on a broody nest while the broody takes a break.