Originally posted by carver9
and Cain thinks twice about fighting him (because Wolverine isn't easy to take out)
That's not true. Juggernaut simply had bigger things to worry about than Wolverine or Sam, and wasn't interested in a fight. He wasn't worried about Wolverine at all (Logan himself confirmed this once Juggs had left).
I agree, though, that Juggernaut cannot be affected by alcohol or most poisons. Most likely he drinks beer simply because he likes beer.