Climbing the rock wall

"Each person must reach the top of the climbing wall with their partner." It doesn't sound so sexy, but you realize something must be coming and your breath catches.

"Ladies first." You look at Doe, who is still exhausted from the last activity, but doesn't object. The sorority girls file around the rock wall with the fraternity guys following close behind.

"Ready, Set, GO!"

Doe tries to climb the wall, but she lacks the strength. You are hesitant to help her. You gently grab her rear and start to push her up, making her cry out slightly, as she is still sore, but she doesn't object.

Slowly you both ascend. You are halfway up when you notice you are in a predicament. Your crotch is placed at the crease of Doe's rear, and you are getting extremely hard.

On one hand, you don't want to release all over Doe and potentially embarrass yourself, and possibly her. On the other hand, your erection is slowing you down and making it difficult to make progress up the wall.