Kitten. Now 5 months old. Likes to ‘talk’ a lot, (not siamese) and is so into physical contact it ain’t funny. Well, it was cute the first week, but now…gahhhhh.
How can I wean the kitty into less intimate contact?
Same way you can train it for everything else. Unacceptable contact gets met with a grab-and-deposit-away and a sharp “no!” Better get on it before kitty becomes too heavy to handle easily.
On the contrary, head-butting or bunting is normal feline social behaviour and should not be discouraged, assuming I understand what you are describing. It is an affectionate, bonding gesture and you may respond by offering your forehead, petting their head or scratching their chin.
In any case, kittens especially need toys and play and attention and be prepared to spend quite a bit of time playing with them appropriately (so the cat bites and eviscerates soft toys, never your hand, works off energy by running around, etc)
Head butting is normal social behavior, but your can train them to interact with your hand, head, arm, or chest, and not with your crotch. And I agree that the way I train my kittens not to bite and scratch me is by promptly removing them and saying “ouch” or “no”. In this case, I’d move the kitten to a part of you that okay, rather than remove it completely.
(We used to foster kittens for the shelter, so we’ve trained lots of them. Tiny kittens routinely climb up my legs. Which is incredibly cute, and an incredibly bad habit to let them develop.)
Kitten needs it; though, as has been said, you can direct it to preferred parts of your body, and you may be able to concentrate it into particular times of day (give the kitten a lot of attention when you have time to do so, and it may be more willing to be ignored the rest of the time.)
You might try getting a second kitten. They can satisfy some of their contact needs, as well as a lot of their play needs, with each other. But of course both of them will still want to make contact with you; at least unless something’s gone awfully wrong with the relationship (though some cats do want a lot less contact than others.)
Your cat is training you.
I put my fisted hand to the head butting and now my grown cats greet my fist with a head butt. It’s really cute way to greet me. I always do the hand open explosion thing afterwards along with the sound effect. It’s adorable.
I agree with the others your kitten needs lots of play time. Get a few toys and get on the floor with her. A played out kitty will take a nap and be very cute. It will only serve to make her a better socialized adult cat. You’ll make a friend for 9 lives.
Just throw your cat a pair of unwashed underpants.
My roommate used to have a Siamese kitten. The cutest little puffball of an animal that you have ever seen. But this little bundle of wide-eyed innocence had a kink.
She would sniff out and find the unwashed underpants. Then she had this way of wrapping herself in them. She’d put her front legs through the legholes and settle in with her cute little face placed firmly in the crotch. And then she’d completely go to town. She just mewl and shake and roll around in throes of ecstatic orgasm. And she would go for several minutes.
It was hysterical. But she never head-butted my crotch. This was so much better, I guess.
Erm, there seems to have been a slight misunderstanding. Kitty doesn’t head-butt me in the crotch, just my face. The closer she can get to my nose and mouth, the louder she purrs.
If I push her down, she’ll pat my face with her paws until I’m distracted enough, then she head-butts me again. EVENTUALLY she’ll just curl up on my lap and go to sleep, but only after ± a half an hour of facial-foreplay.
Thanks for the explanations though folks. 
Oh, forgot to mention she has a feline-friend, our older cat Coco. Coco is a bit of a grumpy old dowager though and doesn’t tolerate kitten shenanigans too much. Doesn’t stop Maggs from trying to engage her.
Well, that’s great. Her using her head and paws to engage your face means she sees you other than the moving object who puts food out and scoops my poopies. She’s smart. Turn those play tactics into tricks.
Beware though. I taught my male cat to tap my finger with his paw for a treat. Now he wakes me up every morning, tap, tap, tapping his paw on my face. I’m one extended claw from missing an eyeball. Cause he always, ALWAYS, has to push the envelope.
(Fwiw, I knew you didn’t mean your crotch)
It’s an enthusiastic form of scent swapping and affection called bunting: https://www.catbehaviorassociates.com/bunting-behavior/
Aww! She loves you. You’re a lucky cat slave.