They can come as a combo.
I had a Mango which was a packer and an stp device and I also bought one (can't remember what it was called now) which was matched to my skin tone colour, via swatches the company send to you, which was a packer and could be used for sex. This came from Australia, was VERY realistic (very convincing re veining etc) but was also very expensive. It was adhered to the body using surgical glue. Unfortunately it meant shaving down there before application and what I found was that the pubic hair grew back within only a matter of days under the glue which stopped it sticking properly and was very painful. Too painful to use for intercourse and incredibly painful when you had to pull it off again to re-apply when it wasn't sticking evenly
I think if you look back through this thread there may be some better alternatives to the ones I used.
Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit salad.