In a burrow, rosies will instinctively pull their head to one side, bite and push prey against the burrow with their neck. So the neck region to a rosy or sand boa is sensitive to touch in that a touch there can trigger a feed response.

I've had rosies that, if I wanted to get bitten, all I had to do was touch their neck with my hand.

Rosies also detest high ambient temps. They have no problem with a very warm heat pad, but when the air temps get high, rosies can get very uncomfortable.

Rosies are different from kingsnakes and such and have behavior peculiarities all their own.
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Mark