I read an interesting, if purient, article the other day. Was in the same vein as this one. Approximately, and without going into too much detail, it talked about the need for "safe words" during rough sex play. ie: Yelling "Help! Stop!!!!" won't get your partner to stop, but yelling "Red Winnebago!!!" will.
Sez me, if you need to scream for help (or, in this case, draw your weapon) during sex, you might be doing it wrong.
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Palomino!