Den. aberrans with spherical pseudobulbs?
 

I've seen a few examples of den. aberrans that have really fat, almost spherical bulbs, like this one (not my plant, just a photo I came across by Flickr user Aeranthes).

First of all, why would some grow this way rather than forming the usual oblong, gradually tapered shape? And second, why is it so stinkin' cute? Finally, can I have one and if so, how?

Good question! I have some aberrans hybrids with such p-bulbs, when they are still small. Later they do elongegate. As aberrans can be very dominant in flower form, the foto may be a hybrid. Of course, the Latourias are currently very popular and there are new collections of less typical forms. That could, also, be part of the puzzle. In strong light the p-bulbs tend to get shorter, but I've not yet seen (maybe I just have!), such globous bulbs on this or any other Latouria in cultivation. There are a few similar species, which may have created such a hybrid. I know, this doesn't anser the question, just shows some of the possibilities .

To be quite honest, I like this sort of puzzle. So thank you for your insight!