I think the funniest thing about hickeys was when I realized how we kids used to give them to ourselves kinda when we were little. I remember sitting in pre-school and everyone was sucking on their arms and watching as it turned red xD
"if only we knew!"

I didn't realize people were so aghast at small red marks. I think they're more like exploded blood vessels than bruises. I wonder if wikiafterdark has any interesting information on the science of hickeys.