What's your point here, that she's going to screw somebody so it might as well be you?
Keeping your pants zipped will have a great effect in NOT repulsing the kind of woman you want while actively discouraging the liberated women you don't want.
Not to mention preventing yourself from being used as a sperm donor by a modern liberated Jane who wants to satisfy her biological clock.
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That wasn't the point and you damned well know it.