I'm sure I can't be the first person to have done this, but I thought people might be interested in this.
I tried a shop-bought one-sided thong once but didn't get on with it, so came up with my own idea using womens' tights. The advantage of this is that: 1) It's cheap; 2) You can choose...
I did this video about thirteen years ago, back in the day when I could still get a decent hard-on. The quality is awful, the editing is rubbish, but I thought you might like to see the content anyway.