This is from memory, so forgive me if I'm wrong. But a 60/25 guy limps in CO(?). Button (?) raises and is something like 50/12. SB folds and you 3bet in the BB with A8s.

I don't think I see much good in 3betting here. If anyone can give me a better argument than "cause you're gonna flop trips," I'd be interested to hear it.