What's the meaning of the last sentence?
Clearly, it was better to be a dog coping with dog-dilemmas like the what-tree-should-I-pee-on-this-morning one, than to be Ronel grappling with such tedious moral quandaries as whether fucking Renana as she bent over his wife’s vanity table was less repellant than fucking her right in their queen-size bed. A question that had many implications, by the way. Because if it didn’t matter, they’d be a lot more comfortable doing it on the bed, and that would be that.
What's the meaning of "that would be that"?