First off there's no "corruption" in zoophile laws. Most people don't approve of it and want it banned, period. There isn't a single politician getting shit for zoophile laws. It's not some widely approved of thing. The sooner you accept that, the better.
Second... Do what you want to do and stop worrying about "the law". I'm in a state where it's illegal, been doing it for years, and I'm still here. Breaking a law has to be proven. If you aren't dumb, there isn't any way for that to happen. If you made it this far you probably aren't dumb.
For your original question about legalization, it isn't happening anytime soon (probably not ever), so best to take the above advice and keep a low profile.