I agree with Sarah, but I am also female.
If this concerns you, just talk to your doc about it. Trust me, he's heard everything.
AJ
Obviously I'm not a guy...with a name like Sarah.
Just my take on this is that not everything on your body is going to be perfectly symmetrical. For instance, one of your ears will be higher/lower than the other, or one of your eyes will be slightly off.
Truthfully, I think many men look at their testis and realize that one is actually bigger than the other...just like women look at their breasts and see that one is larger than the other.
NOTHING on your body is going to be perfectly symmetrical...as NO ONE is perfect...