I profess ignorance in the rooster department, since these are my first. So if he doesn't know or care, then is his brain on a loop? Are matings separated by an internal clock? Where does the sweet rooster behavior come in? The protective nature, etc.? Rodeo is so right as a description - like steer roping. In the morning, as soon as the "it" girl is out of the chute, here come the boys, one on each side running her down. I can't help but cheer when the swing-up lands with a thud. Silkies are such kids in snowsuits. I can't imagine either hitting the target. However, I'll still be vigilant about collecting eggs. Hope I don't get any suddenly broody hens....
I say just thank your lucky stars it's a hen he's going for! I've read some truly crying funny threads about roos going for shoes, owners, all sorts of things.
So far as big roo and little hen, I have a pretty big Orp roo that "loves!" my Dark Cornish girl. But then those things are pretty solid birds, in spite of their apparent smallness. You can just barely see her when he's doing his thing but she appears none the worse for wear. And is laying 100% fertile eggs. Every egg she's ever laid so far has been fertile. I mean EVERY one lol.