I saw a web broadcast on www.childnett.tv  by Stephen Shore, an Aspie who is working on his doctorate in an ASD field (psych, I think? can't remember.) Anyway, he has a great sense of humor and he made a comment, like, "some of us are on the spectrum and the rest of us are waiting to be diagnosed."
I think that is so true. I never heard of "proprioceptive input" until we started dealing with OT. But I can tell I too really crave it. I love sports like skiing, horse-back riding, swimming, I used to do gymnastics as a girl. I am very "touchy-feely" and tactile, I love swinging and trampolines. I think that's why I don't mind when Eric wants to sit on me or hang on me all the time, although it would drive others nuts, I kind of like it. I know I need to teach him what is socially acceptable, but I admit, sometimes his "hugginess" feeds my own proprioceptive needs. We have tons of fun doing OT together.
As for my husband, he is the quintessential absent-minded professor. Until we had Eric, I never noticed this about Keith, but Eric does this all the time and it made me see Keith does it too. Keith sometimes is "in space" and you have to say something more than once to get a response. He can be very focused, to the exclusion of anything around him, when he is writing or working on an idea. Keith has often said too that he can identify with Eric's learning style. Since he is a college prof, he is used to seeing all the different ways people can learn.
Just wondering if you all had similar observations.