Having somewhat first hand experience on this topic, I too have done my research and I have talked to a psych doctor or two concerning this matter. Now before I go on, I must say I didn't make an appointment with them, these docs were just people I have met along my journey here.
I agree with Susie on her outlook on shrinks, most of them are indeed in serious need of psych help, however, there are more and more shrinks out there who deal with just this issue. These shrinks are surprisingly versed in kink and all tha entails.
One with whom I spoke with for over an hour and a half alone on this topic put it to me in a more simple way, one in which might clear a lot of this up for a lot of people. After explaining to me the definition I wasn't sure quite how to answer him. I had trouble grasping the concept and definition without being able to see it in black and white. So he ask the following questions to me..
1) Can you have regular sex? Meaning can you have pleasurable sex with your partner, as in two regular people (in my case, not thinking of him or him of me as doctor and nurse. Might be different for others i.e., not thinking of your partner sleeping in a crib for example). My answer was yes, when we have sex I don't picture him with his stethoscope around his neck and my chart in his hand or anything, I see him as a normal guy that I just happen to find very hot and sexy, lol.
The next question he asked me was.....
2)Can you get sexually aroused, and or have pleasurable sex without incorporating anything medical? Such as shots, enemas, examination, scopes, thermometers, etc.? My answer again was absolutely yes I can and do. I don't have to have those things included in my sex life, and I don't have to be on an exam table, lol.
So the shrink said, well you answered yes to being able to have pleasurable sex without having to bring anything medical into it, so NO you do not have a paraphiliac disorder.
So I hope maybe this helps clear things up, clear as mud right? lol.
Mashie