The silicone injection idea is alive and well in London. One of my regulars, who also does my waxing, has had two injections, both against my advice. He sai he thought he needed a thicker cock. His cock was perfectly OK, in my view, large and thick. I think he was just insecure. I don't like the result, best described as soggy! However he still cums loads, and as I am a top, it's not so much of an issue. He admits some loss of sensation, and I don't think he is as hard as he was. Also several thousand pounds poorer!