I found a very good base for my wife’s suction cup dildos & wanted to pass it along to any LH users that may also find it useful…a 10 pound (or heavier) barbell weight that has a flat side.
The suction cup will stick very firmly to the flat metal surface & the barbell plate is heavy enough that it won’t move or lift at all while being ridden. You can put a pillow or two underneath it if you’d like to adjust the height.
My wife likes to position it near the headboard, using the leverage her grip on the headboard gives her to help her bounce up & down - the little tramp! 