Working hard to refrain from getting a turgid swelling within one's lower parts
Even though attempting it, I'm focusing intensely on preventing any sort of unwelcome erotic arousal below the waist. Through this attempt, I'm dedicated never succumb to whatever uncontrolled physical reaction that might exceedingly come up.
In a conscious attempt to control any untimely physiological manifestation, I am actively grappling to abstain from having an overwhelming boner in while this given time. Through sheer self-control, I attempt to suppress any impulses relating to sexual stimulation.

trying not to get a boner