Jack-Off with Roll of Paper Towels?

It was a very tight fit over the head but it worked!

Any other ideas when you have to knock one out?

Lol, I've done that before. I lubed up the inside of a toilet paper roll with some Keri lotion then jacked off by stroking the roll over my cock. Normally I couldn't fit inside of a toilet paper roll because my girth is a little above average at 5.5" but with lube I can slide in with a little effort. What is the girth of your head anyways?