Here's another skink who love's neck tickles
gets her front legs and head as high as she can to let my finger tip get in there to do the tickling and then rests her neck on tickling finger to get more sensation - I'm always very gentle - scared of hurting her.
I don't care what anyone else says, she's doing this because she likes the tickling under the chin and under her neck of her chest and it's her way of saying how much she appreciates the live food treats I give to her by hand.
My lizard even assumes the position and it's regular thing with her now .
I have been told by dragon owners that their much beloved dragons do the same so it's not a behaviour particular to just bluetongues and EWSs. I don't if geckos also do this too if they have a specially trusting and comfortable relationship with their people or special person.
Would love to see some photos of other peoples skinks, dragons, geckos and frogs enjoying a neck tickle.
The lizard has to be really comfortable with you and trust you a lot to voluntarily permit that kind of intimate physical contact. That's very special IMO.
Our skinks (Bluey included) will do the same... I can only assume they like it - or else they'd be running
Or backing off an inch or two and glaring back at you as if to say " who told you that YOU can touch ME ?" .