suckling (sucking) and kneading my neck

suckling (sucking) and kneading my neck

when i got my kitten she was 8 weeks old to the day. today she is almost 7 months old. she has this thing with nuzzling into my hair ,"sucking" on my neck and kneading her paws into my neck / shoulder while she does it. th begins the secondi get home from work and continues. no matter how much ipull her away she will try relentlessly until i give in. it eems to put he at ease as she purrs so loud whenshe does it. any suggestions on wht she does this and how i might get her to stop???