Why didn't they use the sheep? It's a good thing I didn't make the movie, or there would've been a scene like this instead:
Ennis Del Mar: Do me a favor, Jack.
Jack Twist: What?
Ennis Del Mar: [Mumbles and unzips his pants.]
Jack Twist: Alright!
Ennis Del Mar: Hold this damned sheep for me, will you?
Seriously though, Brokeback Mountain is beautiful. That two-shirts-on-one-hanger thing at the end kills.