I'm not Welsh, so perhaps I can take the sheep shagging insinuation with a pinch of salt, but it does get pretty tedious when you say you're from Wales and immediately get the same, tired old "joke".
Ddraig may not have the most legendary level of patience, but I am not surprised that Welsh people do get pissed off with it.
Funny thing is if we had a thread about how the English fuck dogs the 'it's just a joke' bell ends would be the first ones wailing.