I've known many women who've enjoyed people stroking or playing with their hair, but never to this extreme.

Hunter x Hunter parody, I believe, of the scene where Pitou probes Pokkle's brain to get information about nen, as seen here: http://www.batoto.net/read/_/20829/hunter-x-hunter_ch198_by_nexgear/2

Which makes me wonder if it should be removed from the Uncommon Stimulation pool, since the original scene itself didn't seen sexual in nature.

It should be.