Bob cums first

Try as you may, for some reason you just can be turned on enough by the sex in front of you to cum before Bob, and he blows his load long before you, then waits for you to finish with a smug look on his face. Finally, as you finally finish, he mockingly says "you lose, guess what you have to do?"
The next day, you show up at Bob's place, realizing that you have to stick to your word. You ask if you can use a condom so you won't get cum on you, and Bob complies. The only downfall to this is the fact that his sensitivity is lowered greatly. And so you begin to pleasure your oldest friend as he gets off to Tawny Roberts in her cowboy outfit. Although you've had your hand on his dick before, it has never been in a completely sexual way, and this is definitely new ground for you. Curiously, you begin to get hard as you begin to think of giving another man pleasure. Your own cock gets harder everytime you feel his penis swell in your hand, though you're not sure why. Finally, you feel the condom get considerably warmer as his manjuice fills it. "Well?" bob begins "Whats the challenge for tomorrow?"