Why did he respond with laughter and no explanation?

Ok, so I was telling my ex boyfriend (still super close with as friends only) about the new guy I’m seeing and I mentioned that the new guy gave me a couples matching bead bracelet. I was telling my friend how cute I thought the idea was and he just started to laugh and didn’t say anything else…nothing at all! I asked and he just kept laughing? Can a guy give me some insight here pls :)
Why did he respond with laughter and no explanation?
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