You felt fur crawl on your legs, as you try, and get up, but what you just realized is that your penis became so long enough, and even though it's shape changed, you were able to suck it from an easier distance. Even if your testicles were now huge as breasts, they still supported you, while keeping yourself elevated.
The fur crawled from where your tail was formed, and then continued to spread to your legs, until they ended to where your feet was located, as you continued to suck yourself off. You have grown a tail that had the same color hair as your own on your head, a brown fur pelt that was covering your legs, and white fur that was on half of your legs. The only place where it didn't spread was your stomach, arms, and head as those were kept fur free, but you had a feeling that it wasn't going to be that.