How do I give my boyfriend a hickey?

Anonymous
i kiss my boyfriends neck and shoulders all the time and he loves it. I'm ready to give him a hickey and I just know he's waiting for it. I don't know how to do it. I was told I just need to suck the skin but how long? how hard? how do I put my lips? tongue? I have no idea!
How do I give my boyfriend a hickey?
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