I have been diagnosed with ocd as well as aspergers. I certainly behave obsessively and compulsively. I am still trying to figure out which of my compulsions and obsessive behaviors are autism or ocd or if it even matters... But yes, there are similarities between the two... the need for routine and things to be done the same way even if they are not the most effective ways to do them, replaying conversations again and again, the need to do things in repetitive patterns (mine are by 5 or 22)... you know, where do you draw the line and one becomes AS or OCD... I do not know... They used to tell me my pacing compulsion was ocd, now they tell me it is an autism type stim. Hell if I know. But I would imagine the intense short term interest would be an AS thing as ocd tends to be more life long effective and generally with the ocd you know it is weird and you do not get as much satisfaction from it as you do the AS related things, which are more of a necessity to function whereas the OCD becomes counter productive to being functional... like my table pacing... I think that is ocd because it used to piss me off that I could not stop until I walked around my table 22 times taking 22 steps. I did not find that pacing soothing at all. I do not know if I am making any sense... Sorry if I am incoherent...
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"...don't ask me why it's just the nature of my groove..."