Spoo,
Don't let it bug you. From your posts, it sounds like you're getting to fire off your rocket more than lots of others. You are certainly a philosophical one so look at it this way: You've got to have a shitty experience once in awhile so you'll appreciate the really good ones.
Her loss. From your posts and Mrs. Spoo's, it sounds like you're a very considerate lover. So as long as she's not the one rejecting you (and I get the opinion she loves the furry simian types), don't worry, be happy!
Now having read that, I bet she's just waiting for you to jump her bones!