Hi Jan, if you are looking for a good strap on, I would suggest using Doc Johnson products. His products are all interchangeable, and you can use different dongs on different strapons, so that you don't have to buy new ones everytime you want something different. Just make sure you buy the Vac-u=-lock system ones, and then they all go together.
I have the radiant gems harness, and the fusion dong, and I can interchange them. The fusion dong one is heaps bigger than the radiant gems penis. this brand is really good quality - so if that is want you and your boy want, it would be a great place to start. We enjoy it
