I am also getting used to my big Buff Orpingtons behaviour.
Yesterday I saw him and his lady buff O hanging about the rabbit hutch where the Sussex (the only laying hen) lays her eggs, I wondered what was going on so went to investigate.
The buff girl was in the hutch but came out when she heard me approaching then he went in and looked around, made some funny wee noises then came back out again. I interpreted it all as the pair of them looking for somewhere suitable for her to lay her first egg of the season.
I went back out later to check and see if she had indeed laid an egg, as I approached I could see 5 hens lurking at the gate. Then I heard funny bubbly/purring noises coming from inside the big henhouse, and I thought 'oh yes, we've got a result' - then I noticed the buff girl in the dust bath having a whale of a time! I peeked into the door of the henhouse and here is big buff boy squeezed into the nest box making funny noises to himself all the while! I opened the nest box lid and he eventually (telling me off all the time) moved himself off a tiny little egg - for all the fuss and care he was taking you would have thought he had laid it himself! ANd he wasn't too pleased when I whipped it away.
It was like he was keeping it warm for her while she had some time off! I asked a few other folk and they have never found their cockerel sitting on eggs! Do I have a modern metro-sexual cockerel?