Did you ask him? Or tell him ?

That is kind of a creepy way to say it, op

I don’t eat food random people have touched either....

You’re not the fucking director. They didn’t hire you to improvise. If he accepted your change, he could end up with your dirty fingers in his mouth 30-40 times!

Yeah that's generally saved for personal romance. You can't expect some dude to be cool with that, plus if you are that socially akward the guy might have ended with a fork up his nose.

I mean credit for trying to make the ad potentially better but you should contact the director about script changes. worst case the director says no and you just stick to original script .

I wouldn't let a stranger feed me either. unless it was alreasy in script.