How long should kissing on the neck last?

I'm currently seeing a guy who's a couple of years younger than me and we're physically obsessed with each other, i really like kissing him on the neck, but sometimes I think it takes longer than it should

So for you guys how long is the limit then you're just bored ๐Ÿ˜‚๐Ÿ˜‚

How long should kissing on the neck last?
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