That is the best when a cat gets all snuggly like that.
How sweet...if you like that you should check out the animal planet show must love cats....lots of guys with cats on that show and it just warms you heart.
That is EXACTLY how my siamese, Blue, acts. He is always headbutting me. If I sit on the couch, he will jump up behind me and just nuzzle all over my head and neck. Wonder if that is a "siamese" thing as none of my other cats have ever done that like he does.