Is it normal that I want to buy a bikini for my sister for a birthday present?

My sister’s birthday is on March 11. She will be 17. I would really like to buy her a pretty bikini for her birthday present from me. Is that a good idea?

Updates
1 y
My sister loved her present! For those of you that didn’t think it was a good idea, sorry I offended you. But she loved the bikini I got her for her birthday!

Just thought I’d provide that update
Is it normal that I want to buy a bikini for my sister for a birthday present?
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