Staying in my sister's room, why does it feels so different to stay in a girl's room?

we are renovating our house, so I had to move into my sister's room. it's like entering a new world. why does it feels so different to stay in a girl's room? it's like clothes and girl stuff everywhere, it even smells girly.
Staying in my sister's room, why does it feels so different to stay in a girl's room?
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