Free sex web camera on line. First teach him to touch. Let him lick you, come in the mood, and then put his hand on the bag.
Suppose first that it will be just a touch. Let him get used to it, and the rest will not show concern.
If only one touch he begins to be excited and slightly open his cock – perfect. No – it does not matter.
Once he gets used to it – start slowly masturbate him, increasingly shifting bag. Free sex web camera on line.