Often thought 'unusual', the Farang predilection toward sticking various appendages into any willing Thai butt usually has a line drawn around the idea of 'fisting'. Most will not even go there.
But here is a photo taken at the Khao Takiab temple where our primate relatives seem to be quite willing to show the way.
As Thai guys say all the time when presented with options regarding an evening of 'sanuk': " ... Why not? ... "

(CLICK TO ENLARGE)