You bet, it's happened to me, but usually when I was younger and always on what was going to be just a one-night stand. The girl at the bar who's liquored-up and ready to go home with just about anybody is apparently often easily "shocked." My theory is, she's with a stranger and there's no feeling of trust or affection -- merely lust. Combine that with suddenly coming face to face with a huge member and it was apparently easy to express the first thought that came to mind, "I'm NOT fucking anything that big." Now, the times I recall this occuring the date in question didn't view a limp cock.... I was fully hard and that sight -- with no warning -- may have been too much to take under the circumstances.
Still, I learned my lesson. Even with the one-nighters that were successful... and I had a bunch... I learned that pickng up a woman in a bar and then just fucking her wasn't my style... the post-coitus "cuddling" (or leaving) and the awkwardness of the next morning I were encounters I wanted to avoid. Besides, what if she was a great fuck but ugly? What if she loved the sex, but I didn't like her? The solution? I began to meet women I really LIKED. Girls with looks, brains and a sense of humor. Getting to know someone over two or three dates created that amazing sexual tension. Thus, when it came time to "unleash" these girls were ready. By this time, even the petite, the shy and the reluctant knew me as a good guy and a guy who would be sensitive and caring -- and careful. Sure, a few of these were nervous at first, but once I learned how to be more in tune with what they wanted, I was never turned down again. Of course, that was years ago and today my wife is flat-out in love with me.... AND my wonderfully long and thick meat.