Insects and other wildlife in general would be easily attracted to the sent of cane sugar. And even past those questions... how does one even build a house without any wooden or stone structure to it?

[ it's just weird and it wracks her with intense curiosity. she steps forward, moving around josuke, and hits the door with a few (polite) knocks. ]

Hello, is there anyone home? If so, please open your doors to us. [ a beat and then another knock, more forecful ] Hello-- oh!

[ and with the next knocks the door creaks open ominously, the force of her fist clicking it a crack wide. ]

Hrm. It seems you're correct. This just raises further questions.