Well you'll probably find that the Ape has better table manners than the Man and therefore the pride of the man would be hurt. You'd also get this whole 'Alpha Male' thing going on, and the loss of a limb or two simply isn't a good thing for modern man!
Being serious - mostly man can control dogs - Apes are just simply too difficult to tame for most men, and are exceedingly dangerous! Not that some dogs aren't, but your average sheep dog is a lot nicer than your average ape!
I agree with SimeyC. But I would add that you would also have to deal with the occasional tossing of the fecal matter (depending on the type of primate you decide to keep as a pet). Can we not all agree that keeping a small monkey on your shoulder is acceptable though? ESPECIALLY if he plays the accordion or grinds an organ.
Can you have pets if you think you'll be away on vacation once or twice a year for a few days?In your opinion, which of these are the best pets to have if you think you'll be away for a few days once or twice a year for...