In the context of BDSM, Pain Becomes Pleasure is not really all that uncommon. In fact, it's the desired end to most consensual scenarios where one individual derives pleasure from dominating or inflicting pain and/or allowing bliss while another enjoys receiving as part of pleasure and, ultimately, for greater pleasure. Of course, each individual and each scenario differs greatly, and this is just a layman's description for those of you who are curious. 
This isn't a huge site, but it's part of a small network and six additional niche sites are offered for free. While all of the sites have a fetish edge, only Fist Flex comes close to the content you'll find on PainBecomesPleasure. In fact, there are currently 12 episodes and at least two of them involve men fisting women. Much of the site focuses on male domination and female submission, but I was overjoyed to find that one episode profiled a Mistress and her man-toy.
One thing that immediately excited me about this BDSM site was the length of the films. Each episode is up to an hour and a half long. You can download these movies as full-length average-quality Windows Media files or view them as clips. There are about 29 clips per episode and each has an approximate three-minute length. Even the low quality is impressive with a good image, great lighting and a variety of angles that focus on pussy clamps, candle wax and spanking with crops, among other things. There are screenshot images offered with every episode, but they are fairly blurry and not worth your time.
Since I'm a chick, I decided to watch the Domme movie but was disappointed that she gave a blowjob and let her sub fuck her, particularly since there was little lead up. Based on this, I'd suggest the site is more for those into male Doms enacting various pains and pleasures with their female subs but switch for a taste of diversity. The blowjobs and fucking by a Femdom make more sense to me in that type of scenario.
Each episode contains at least two full scenes with gorgeous babes, older sluts and even a few BBWs. No matter who the models are, many scenes will get the BDSM dabbler going. As for those into the lifestyle? To me there was a certain lack of eloquence to the punishments, yet there were some exceedingly fascinating and painful techniques used by some of the Doms on this site. Indeed, pain does become pleasure for one sub when a Dom clamps open and ties this bound and ball-gagged slut and then coats her open pussy with hot, slowly dripping wax.
Scenes like I've just described are interspersed with BDSM-lite and may not appeal to the switch or the dabbler. In the end, while the content quality is decent, there just isn't enough of it unless you like the pissing, pregnant, fisting, MILF and drunken babe niches of the other bonus sites.
