I'm a battered wife...

It's the weirdest. Every time Seth and I go through a drive-thru, I end up feeling like a battered wife.
It goes like this:

Drive thru guy: Can I take your order?
Seth (quickly & efficiently): Yep, I'll have a double stack, a large iced tea, a chicken nugget and a fry.
Drive thru guy: Is that all?
Seth: Nope, we also need...(and then he looks at me expectantly)
Me: Ummmmm....I'lllllllllll....haaaaaaaaaaave....theeeeeeeeeeee....ummmm......a......
Seth (all super annoyed with me) - to the drive thru guy: Hang on! (trying to prompt me by looking at me and bobbing his head like how chickens peck at grain)
Me: (kind of nervous, feeling rushed, and trying to frantically read the dollar menu before I get yelled at...) OK, I want a............um.........junior bacon cheeseburger....and.........
Seth - (whispering without whispering, in that quiet but loud way) to me: Oh my god, seriously? It's the same menu as always.
Me: I know, but you are making me all nervous. I cannot make a decision when I'm nervous. Just let me look a second. It' not that big of a deal.
Seth - (kind of apologetically) to the drive thru guy: Hang on! She doesn't know what she wants.
Me: And, I'll have spicy chicken nuggets...
Drive thru guy: What kind of sauce?
Me (all frantic again, trying to remember what my choices are): Um.....the mustard...the sweet...the honey mustard! And fries, please.
Drive thru guy: Is that all?
Seth (rolling his eyes at me like we've been in the drive through for an hour and a half, when it's really only been 2 minutes): Yes, that's it.

And then, when we get up to the window and we are waiting for stuff, I say to Seth, "Hey, can you get me a sweet and sour sauce too when the guy opens the window?"

Seth, in this highfaluting way says "No! If you wanted sweet and sour, you should have ordered it at the first window where you were supposed to order it...I'm not going to make that guy do extra work just because you didn't order what you wanted. "

To which I respond, "I did it on purpose Seth, because if you order extra sauce right away, you have to get in a big stupid argument with the drive thru guy over the goddamn microphone about how the nuggets only come with one sauce. Then you have to explain how you don't care, you need two sauces, and then they say 'well, you're gonna have to pay extra for that', and it's just a big hassle. But if you just wait until your food comes out, then ask real nice if you can get a sweet and sour sauce, it's not like they are going to ask you for a quarter. And it only takes one second for them to get the sauce for you."

And the way Seth looked at me, I knew he wasn't going to get me the sauce.

So then I said "Whatever. Just lean your head back when the guy comes with our food, and I'll ask him myself for the sauce. Why are you such a drive thru dick?"

Then the window opened and I got my sauce.