LOL!! You and Hair with your over-sexed horses! ;o) If he don't have any noogies, you don't have to worry about it. Even if he was cryptorchid(undescended testicles), he couldn't produce any active sperm so you'd still be in the clear. Suger just gets to enjoy the services of a "stud" without getting pregnant and if he doesn't exhibit any other stallion-like behavior like agression, I wouldn't worry about it. Let them have their fun!
I am so glad, it was not too bad for you. Hope Cav was the same.