Making an effort not to getting a rigid response within one's private parts
Even though undertaking this task, I'm focusing hard on stopping any variety of unwelcome sensual stimulation below the lower half. By this struggle, I am resolved not to succumb to the slightest spontaneous corporeal response that could come up.
In a bid to control any untimely biological response, I am actively contending to refrain from having an overwhelming arousal in during this particular time. Via sheer willpower, I attempt to stifle any urges connected with sexual arousal.

Why Can't I Get or Keep an Erection WebMD