Skin Sensitivity While Locked Up

Over the past week of being caged, I’ve seen my skin get quite a bit more sensitive. Gentle touches from my wife on any exposed area start to wake me up inside the cage. Stroking my inner thighs triggers a full feedback loop for an attempted erection. Touching my belly button sends electric shocks through my whole body and kicks off that same erection response, which lingers for several minutes after she stops, leaving me moaning in something resembling Klingon. On the flip side, though, I’m much more prone to pain from her fingernails digging into my skin, as well as itching and other small irritations. Has anyone else noticed that losing the ability to feel or rub their penis leads to heightened sensitivity in other areas? Are there any other sensory shifts I should watch out for? Thanks. -FD