1. Because Pixar won't let you make Woddy have a bigger woody
2. Take every normal job out there and make it sexual and you will get payed at least twice as much, kid.
3. They all react pretty nicely, although probably because I've told most of them that I'm currently working on Frozen 2.
4. We don't actually have a studio. We all work from home, or if more honestly, our mother's basements.
5. Dude, I make three-dimensional boobs for a living, so naturally, I went to Harvard and got my bachelors in three-dimensional boob making.
I feel like I'm deep enough in to answer this. Although it's still from the perspective of someone with a couple of artist friends and from having dabbled in animation myself.
1. Once you get your name out there and produce consistent quality work (or easier, cater to a special niche fetish), you get a good months pay while not having to answer to any superiors.
2. Most animators these days have a Patreon and even without the total sum displayed on some, you can easily calculate a low average by multiplying the number of patrons with the lowest reward tier that actually gives anything. For example, [SelfDrillingSMS](https://www.patreon.com/SDSMS
) probably makes at least 6k a month.
3. Depends entirely on how prude your environment is of course, but I know from some NSFW artist friends that most of the people around them don't know about the NSFW part.
4. Usually just the single person making the animation. Sometimes they pay a voice actor for the female voice or buy models, but the norm is working alone.
5. Some I've talked to actually use it to build up skills and funds while going to school. The animation work itself is relatively simple and generally mostly just repetition. It's also easy to reuse animations between scenes. Free software like Source Filmmaker also makes it incredibly easy to create professional looking animation.