Making organic body jewelry

I just started making body jewelry with wood, namely plugs /
earlets, and I had a couple questions I was hoping somebody could
answer:

What do I need to make them with say a lathe? Like if I wanted to
make flesh tunnels or flares, how would I go about doing that? I
haven’t been able to find any resources online that provide a good
description of the process.

Please help!
Thanks,
Andy V.