<human>: We just started dating, haven't had sex yet so it can't be about that, he made a remark that I should have 'more adult style', does it mean dress more conservative? I really like him so of course I wanna impress him on every level. Sorry if it's a really silly question, I just never heard such thing before. Please let me know if you know what it means, thanks!

Could you distill the essence of the text into 1-3 sentences?
<bot>: A guy I date told me I need more adult style, we haven't slept yet, so what is the meaning of what he said?