The Pipedream Fetish Fantasy Elite 4.5" dildo is a gorgeous piece of silicone bliss. It's shape is very similar to that of the Lelo Mona- bulbous tip with a more narrow shaft. It has a flat wide base, so is safe for anal use and totally harness compatible. The only thing that I would suggest is sticking another suction cup toy to the 4.5's suction cup to provide a handle for thrusting- either to stimulate your G-spot or his p-spot.