I recently bought a sex stool: https://www.amazon.com/LoveBotz-Bangin-Bench-Extreme-Stool/dp/B06WD5QC6H
This is probably one of my favorite things to play on right now. I works very well and it takes the stress of my knees. I have a couple of nice big dildos that work great for this stool. I played on it today for probably about a good 45 mins. I found the right position and had me shaking when I was done! Great stool for the price. I woul love to have monkey rocker, but not at those prices.