something like this with the option of a visible glans might be a good idea, but I find it hard enough getting a decent grip straight up with my hands. It could make for some interesting conversations by the water cooler; "What's that under your shirt? Do you have man boobs or something?",
"Well no, I'm stretching my penis in the over the shoulder position today to keep my tunica elongated after the stretching session I did earlier today."
"Oh ok, here's my phone number if it works."