They are always willing to stick their neck out for you.
Which hole they stick their finger in when no-one's looking.
A flea once they find someone they like they stick to them !
He'll probably catch fleas
A flat mate.
A nun with a javelin through her neck.
The giraffe and the aardvark were running neck and neck but the aardvark won by a nose!
A long necked toothbrush.