I don't know about other guys, but I wouldn't give two toots if a girl I went out with got spaghetti and had problems eating it without being messy. I'd probably think it was darn cute.
Depends on whether or not she has a sense of humor about it, though. If she didn't, then it probably wouldn't be too fun. If she did, though, it would be a great time.
As for my contribution to all of this...looks like I'm gonna have to be the one to drop the "cynical bomb" on this thread.
As over-generalized as it may sound, let's face the facts: saying "I love you" too early in the relationship, much less on the first date, is pretty much the best way to throw a monkey wrench in the gears of your trying to find a significant other.
So, you know, don't do it for a while. Even if things are looking good, people get spooked when someone says this to them and they're MOVING in this direction but really aren't 100% sure. Give it at LEAST a couple months, or, if you're sure you're falling in love with someone within the first month or two, wait until your SO says it, or something that's a good lead-in to it.
I know this sounds obvious, and it sounded obvious to me a year and a half ago when I was with my ex. Yet emotion got the best of me and I said it too early on, and even though we lasted for a few more months after that, it still poisoned our relationship.