Injections of free silicone into the body are in my opinion not only an illegal practice but an abomination to be urgently avoided. 

 Some physicians and many untrained amateurs illegally inject free silicone into the buttocks and some also inject a variety of fillers. While I do not recommend either one, I must alert those patients still in denial to the risks and side effects of free silicone injections in the buttocks and thighs. First of all they look appalling by and large. Furthermore they cause many health complications both systemic and local and with time the appearance becomes highly unattractive. In addition there are many alternative routes that one can pick including fat transfer. We have local surgeons in  Los Angeles for instance, who do superb work with fat transfer. In some of my patients we deliberately fatten them up by modifying their hormones after which the surgeon is able to harvest sufficient fat to generate a beautiful job. Furthermore hormone therapy will with time cause a nice deposition of buttock fat and finally I have seen several transsexual entertainers who developed impressive, attractively shaped buttocks simply through the use of squats. Squats are very good for your health, give you improved lower body strength and stability and if applied assiduously, can have a marvelous cosmetic result in the transsexual patient. Finally I personally do not recommend buttock implants because I think they look very unattractive and feel hard and unnatural to the touch.