Single Rear Wheel vs Dually - Whats the Best for You

So...back from my dinner, and seems little interest, after 12 pages of thread. The bikini is partially missing...yes, it is MY bike...don't ask. I best let my better judgement keep up with my foolish fingers. I am not sure if making the pic appropriate, would be immediate, when posted. Nope, not going to ask wife.

Jerry