it's a result of the reduction in the force due to mavity on the vestibular system due to your sudden downward motion.
this is rationalised by your body as a strange feeling in your nether region below the bladder, near the prostate gland (which is why it is often... stimulating)
Why this sensation is realised there, i have no idea, but it seems to be very common.
this is rationalised by your body as a strange feeling in your nether region below the bladder, near the prostate gland (which is why it is often... stimulating)
Why this sensation is realised there, i have no idea, but it seems to be very common.