He Tries to Hide it

Feeling a little panicked, the man - Arthur - grabs his engorged cock, trying to push it back through the hole in the torn Lycra but to no avail. The hole is literally the same size as his shaft and has almost formed back around it. All the while it's erect like this he'll have no chance of getting it back in.

"Move round into Mountain Pose," the instructor calls, and Arthur moves as quickly as possible, standing straight, but only moving one arm to his side. With the other he grabs the hem of his T-shirt, pulling it down and trying to hold his cock up straight to hide it under the T-shirt, not knowing how long this will last.