I'm writing something where on character looks at another character like they're stupid. Is there an adverb or something for that? For example: When the grown man asked his friends where babies come from they looked at him 'like he was stupid'. is there a word I can use to replace that?
..they looked at him incredulously.
Excerpted from MW:
unwilling to admit or accept what is offered as true : not credulous : skeptical
- incredulously adverb
They could be looking at their friend scornfully:
scorn: an expression of contempt or derision (Merriam-Webster)
They could be looking disdainfully or contemptuously. Disdain is to think unworthy of notice, response, etc.; consider beneath oneself (Dictionary.com), and there's this definition of contempt from Merriam-Webster: a feeling that someone or something is not worthy of any respect or approval (Merriam-Webster).
Edited to add a link for that last definition, and to add:
Flabbergasted! I love that word. They could be flabbergasted: to overcome with surprise of bewilderment;astound. (Dictionary.com)