Fighting is intense but too hectic to be truly sensual. Effort is difficult, thus, a nuisance. A real struggle is really tiring. The "silencing the sentry" is an action theme that captures the intensity of violence at a casual pace. Should the intruder (or escapee) stalk and subdue guards easily then the thrill shall be that of dominance and submission.
Violence can be sexy, especially as art or fiction. Grim, yes, but true nonetheless. Death is fascinating but only to those accustomed to life being valued. It is the virile intensity of sex, violence and slaying that make them so potent and interesting. As artistic themes, there are none more thrilling.
I prefer the "silencing the sentry" scenario to be swift, simple and sexy. Being a dominant heterosexual male I want the victim to be a comely female. Ideally, she is snatched unawares. She may struggle, feebly, but soon goes limp. She may wince from the sting of death but she shall not linger. No blood. No bruises. Her head may