At about 8 minutes in...
https://asiangay.tv/2026/10/binky-x-lucas-2/
Aneros prostate massager is a great place to start. Can learn and create a biofeedback loop. Learn to fuck yourself with whatever you put in your hole.
Then type knotted dildo in Amazon's search engine ;)
https://www.amazon.com/s?k=knotted+dildo&i=hpc&crid=1PD9X3VWZX6ZK&sprefix=knotted+dildo%2Chpc%2C156&ref=nb_sb_noss