What is tongue lengthening?
Tongue lengthening falls into two general categories. In a historical and yogic context the tongue can be genuinely lengthened and enlarged by "milking" it, a process most analogous to forms of vacuum pumping. To simplify, the tongue is held and kneaded and massaged, and then, using a cloth to hold it, it is pulled and twisted it for a few minutes. Over time this will leave a greatly lengthened tongue for use in advanced yogic practices that are well beyond the scope of this FAQ. If you are interested in more on this subject investigate Khecharî Mudrâ and Jivhanirlekhan yogic techniques, but be aware that not all practitioners of these arts in the West will espouse these more esoteric practices. More commonly — so commonly in fact that it's really the only kind one will see in the West — is the cutting of the sublingual frenulum. This doesn't actually lengthen the tongue, but it can dramatically increase its mobility by eliminating the "tongue tied" effect, giving both the illusion and the function of lengthening. Not all people can achieve lengthening using this technique, but more radical procedures cut into the musculature under the tongue further exaggerate the effect.
What are the benefits of tongue lengthening by frenulum cutting?
You'll effectively have a longer tongue and all which that entails.
Is tongue lengthening by frenulum cutting dangerous?
The procedure itself can damage glands, blood vessels, and muscular tissue in the area. Short of superficial cuts this procedure really should be left to trained medical professionals. There is also a risk of scarring pulling the frenulum back together and shortening the tongue. As a result many practitioners will cauterize the incision or remove a section of tissue making closure/stricture less likely.
Where can I find more information on tongue splitting and tongue lengthening?
As of this writing BathmateE/extreme contains well over a thousand pictures of tongue splitting, tongue splitting procedures, and related activities, as well as about a hundred first-hand accounts written by BathmateE members.