Just had another thought...
If you are more daring you could cut a slit right the way through the length of one tube, fill with staples or even drawing pins (tacks) then wrap it back around the penis.. and then cover it with another tube so the pins cant pop out =)
If you are more daring you could cut a slit right the way through the length of one tube, fill with staples or even drawing pins (tacks) then wrap it back around the penis.. and then cover it with another tube so the pins cant pop out =)