>wtf this is Precisely what gallery title promises
>what the docking means You can divine the meaning of the term in this context quite clearly from the graphic depictions of the process, but if you wish for elaboration, well, how should I put this... To dock something, one need to insert knob A in hole B. Only with "docking" in the context of sexual interactions, the hole B is usually located on the knob C, so - in a manner - knob A is inserted into the knob C through the hole B. Hope that helps.