The shearing's considered foreplay 
I think that's wrong.
I think the way it works is you get them pissed on the sheep-dip. Then fuck them, hanging on to the fleece to stop them escaping.
Only then do you shear them.
But please don't ask me how I know any of this

, and by the way, I'm not Welsh either (apologies for the gratuitous joke to any Welshmen reading this, it's a beautiful country which I enjoy visiting

)