Does he like me just for my looks?

I’ve been on 5 dates with this guy. He recently texted me and said he can’t wait to see me in a sundress. My past bf was all about looks and it turned me off because he was so obsessed with looks. How do I know if this new guy I’m dating will be all about looks too. He doesn’t seem that way but I don’t know him well enough to know what he’s thinking. How do I respond to his comment “I can’t wait to see you in a sundress.” What should I text back and say?