I didn't like G-string, I am not used of it and I prefer more material than just a string. lol I know a lot gals and ladies love to wear them but not me.
I still can accept wearing tube bra as its quite popular now. Even woman in 40's would buy them to wear. No kidding, I am speaking the truth.
There's nothing wrong wearing tube bra, its nice and you can wear in to fit your cloths.