I met my boyfriend when he was 22, and I realized there was something different about him when I saw the way he walked, and when I got a good look at his hands. He has arthritis, also, and is currently defying doctor's previous estimates that he'd be in a wheelchair by 25 (though sometimes he does use those motorized carts at the store).

We have always had a healthy sex life, and it's never been an issue with me — I love him, and that alone makes the sex even better. We can't do certain exotic positions because of his disability, of course, but that doesn't stop us from exploiting the ones we can! When the opportunity arrives, just let your lady know that the chances of her climaxing on top are much higher than in the old fashioned missionary position. :)