Looks like I missed out on this debate, but I'll throw in my two cents anways. Yes, tits can get you more hits, but there's more to it than that. With poser (or any other 3d program), rendering nudes is EASY because all you have to do is load the base figure and then just render away. It takes less memory, time and effort to render a nude vicky on a plain background than to add an outfit, scenery, good lighting, etc.

This is opposed to nude modeling in real life, where you must first convince someone to take off their clothes. If I had to say to someone "please take off your clothes and hold this sword and go stand in that temple set I built while I snap some photos", well my gallery here would be slightly smaller to say the least...

This is also opposed to drawing or painting nude art, where one first needs to know how to draw or paint. In poser you need to download/make the right figures and then turn the right dials. The basic nude figure with roughly human proportions is already made for you.

In short then, the tools that are primarily used to make rendered images of people around here (poser) lends itself to making nude images more easily than any other kind of image. Thus, I do not finding surprising that there's a lot of nudes around here. As for why it's mainly female nudity, I don't know why, but I'm not complaining...

Anyways that's my two-cents, aside from that, there's nothing more I could add that hasn't already been said.

The strong do as they can while the weak do as they must.