To be honest I don’t think this would exactly work out as planned.
How exactly would you *flick the switch* or even press the release valve if it is under the skin? Yes you said that you can feel it… but can you really feel it?
Hello. Yes, you can feel it, because there is a logic. If the Switch closed, it is “high” position in the direction of the body. And viceversa when the valve is “closed”. The switch can easily be operated after a stay in a warm bath tube when the skin is soft.