We're not sure why this small spongy section inside the vagina is termed as "elusive" or "mysterious". It's so easy to find with your finger or curved vibrator. It's inside the vagina located about 2 inches up on the front facing wall. These oh-so important adult products are not like other toys, they are to be left stationary inside. Insert just a few inches until you feel the tingling erotic pressure, turn up the motor and let is stay in place.
Some women like to rock them back and forth gently but you shouldn't thrust in and out, you'll miss the mark and it won't be able to produce the strong internal pelvic orgasm that they are known so well for.