Male friend (who I speak to daily) puts his arm gently around my waist at a party but then quickly removes it, what does this mean?

Backstory: He’s a close male friend for few years. We get on well and text almost daily. We hang out sometimes after work and will talk for hours. He put his arm around my lower back and waist at a party, but then very quickly removed it. It’s the first time he’s done that. It felt nice and I’m not sure why he quickly removed it. Boys- is this normal from a guy friend? TIA

Male friend (who I speak to daily) puts his arm gently around my waist at a party but then quickly removes it, what does this mean?
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