Obviously, I'm not clairvoyant or a psychiatrist so I cannot tell you why you hesitated to introduce yourself to the man at the pool who had facial paralysis. However, that doesn't mean that I can't indulge in some unsubstantiated speculation. Perhaps you are trying to disassociate yourself from being 'the lady with the facial paralysis' and in your subconscious, thought that introducing yourself to the man in question would be like putting yourself on the same level when you would rather not think of yourself 'that way'. Of course, this is simply idle conjecture on my part and of no consequence.
The important thing is that you immediately felt remorse and regret for purposely ignoring the man and have vowed not to do so again, should he return. As your post title states "lesson learned' and as James Barrie, the creator of 'Peter Pan', once wrote: â€œLife is a long lesson in humility.â€