Hey, I suggest you better and satisfying masturbation by using sex machines. I think you will be more satisfied using sex toys Rather masturbating of your own. Just pay a visit to Hismith.co.uk. They have wonderful services for beginners and has different types of categories according to the comfortability of the customers. They provide quality sex machines at a very affordable price.
I think the best way to humiliate yourself while masturbating is to lie down and put your legs up so that your sperm falls straight into your face. Better still if in your open mouth.