I like the sound of Sticky Belly Cock Flap. What is it?

Sticky Belly Cock Flap - I think it's something like what you'd do with those little men with sticky balls on their feet: you throw them at the wall and see how long they stick there. Kinda like that only the little man is your little man and the wall is your stomach. Usually attempted while standing - knees slightly bent - stark naked and thrusting ones hips for best 'flappin' motion.

Videoing it for the (discomfort surely) pleasure of subsequent generations, however, is not generally recommended

Yr close. It's a summer pastime where the male members (tee-hee) of the family get naked in the garden, put a blob o' something sweet'n'sticky in their navels, and lay in wait on their backs for a flying creature or insect of some sort to start sniffing around. Then, BAM! The latter part of yr explanation is pretty much spot on, save the standing up bit. Might have to try that position before the summer's out, just as long as no-one's filming