I'm no expert on these matters either, but I'm pretty sure (certain) that the mechanism behind erotic asphyxiation is an entirely different beast than that of inhaling DMT vapor.
I have been known to uh, experiment behind closed doors in the bedroom, and the method you are talking about should not be undertaken either alone or with a partner, unless one absolutely knows what they are doing.
If you are alone, and use the belt you mentioned (and yes I know you said you wouldn't, but I'm still sharing this), it's a perfect route to death, or worse, crippling brain damage.
And if you found someone dumb enough to help you, the odds are arguably worse. What if they wrongly determined the time for you to be choked, and waited too long? Do I need to elaborate ?
You are talking about a serious, advanced BDSM technique, not a way to get a cheap thrill.
PLEASE DON'T!
By the way, where did you read this theory? There's a lot of wacky theories and pseudoscience surrounding the molecule, due primarily to it's place on the DEA schedule and lack of real research. I'm curious to read this one tho.
Sine experientia nihil sufficienter sciri potest -Roger Bacon
*γνῶθι σεαυτόν*