Sometimes I want to buy something I don’t need for a weird reason.

I was trying to help my grandmother find some new curtains. <br>I was looking at flash sale websites with her and I couldn’t help myself but buy some cheap curtains that I don’t need. I didn’t want to buy them, I just wanted to know what the experience is like because it’s so cheap (literally $5). <br>And when I receive the curtain, I was like “oh, I don’t need this” and give it away to some distant family members and they also couldn’t make use of it. <br>What’s wrong with me?