He's hungry
A guy sucking on your neck just means he really likes you and he wants to have sex with you.
It means he realised he was too "forward" by smiling at you, so is now trying to control himself.
The lions mane interferes with neck bites it may sustain in a fight.
You have startled the dog..scared him
They like you
He's hungry
A guy sucking on your neck just means he really likes you and he wants to have sex with you.
It mostly always means the hourses are playing
He might be a vampire or he's just weird.
It means that he has no respect for woman whatsoever, and I am a guy answering this.
He's just really horny at the time and wants to fool around with you.
How old are you? I mean seriously. And most likely because that is strange.
if you mean, "why do guys like girls necks" then the answer is they just find it romantic if you huddle your head into their neck, or boys give females love bites on their necks sometimes.
It means he realised he was too "forward" by smiling at you, so is now trying to control himself.
You may have bed bugs.
Thor