I would have to say my rabbit i have gone thru a couple of them..
I have a longish and quite thick dildo with a suction cup base. It has just the right balance of stiffness versus flex with a realistic firmness and feel. I can stick it to any smooth vertical surface and back onto it. I have a coffee table that I can stick it on the corner of, and drop onto it. Serves a dual purpose then of glutes and thighs workout while I ride the pleasure train.
A sexy man with a big dick.