Learn English – I have a shiny mood / My mood is shiny OR I feel shiny

First let me say, the sentence is confusing, and I wouldn't say "get you to a gut level". I have never heard someone say this. Since this is not a common expression, I can only guess at the meaning. However, I'm pretty sure the meaning is this:

"Gut" in this case means intuition. Common phrases using the word "gut" are "trust your gut" (decide using your instinct/emotions), "feel it in my gut" (something deeply resonates with you) and "gut reaction" (a response based off of emotions rather than logic)

So in this context, it most likely means that the narrator in your sentence wants to seduce someone so that he/she will make decisions based on emotions and arousal, rather than on logic.

I doubt thanks before is commonly used in this sense. Thanks in advance is frequently used. Here is some data on the matter. If we let Google expand our search for context, notice that thanks in advance has the context we want.

If it is written, then I personally don't think it is rude, since I understand that the author is trying to be polite. If it is spoken, and the speaker says it in a presumptuous manner, then it is really irritating.

However, there are people who will find it rude. They will more likely take it as a presumptuous statement.

I personally say, or write in an email, "Thank you for your consideration". Some other alternatives include:

1. Thank you for your time.
2. I (would) appreciate your/any feedback.
3. I appreciate your consideration.

I found a post online that addresses this matter. The author gives some other alternatives:

4. Thank you for considering my request.
5. I will be grateful for any help you can provide.
6. I will appreciate your help with this situation.
7. I hope you will be able to provide the information.