I think these sorts of insecurities are usually age/maturity related... that is not to say that a 50 year old doesn't experience insecurity... it's just that a 50 year old develops confidence in areas OTHER than their sexuality which helps give them a more realistic and balanced view of themselves. Also, sexual technique improves with age (usually), and once people know how to use what they were given, they tend to feel better about themselves.

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