My girl wants me to sleep with other girls before her, is it normal?

My girl is a virgin and so am I. She wants me to have experience with some girls for a week before she starts dating me. She arranged with some of our mutual friends and she stopped talking to me pretending to be somehow not interested in me.
What does that mean? Is it bad or good?
My girl wants me to sleep with other girls before her, is it normal?
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