It's Time For An Erotic Review of S hereby released into the public domain, Sina Velvet is the pornstar with the big ass. Born in Austria, this young adult male has impressed the adult community all over the world with his incredibly good looking abs, large penises and a very large sex life. And you thought you were only going to get one shot at her, when it comes to sucking cock, you got two. Her name is Sia, and she is from Austria. She has been in the adult industry for a few years now, but it wasn't until last year that she decided to get into the porn industry and be seen by the general public..