An Erection is a guy's equivalent to a dog's tail wagging.
An Erection is a blood-powered hydraulic
An Erection is a blood-horn.
An Erection is a meat arrow saying 'YOU.'
An Erection is a progress bar of how horny a dude is.
An Erection is a thumbs up in your pants.
An Erection is a penis mansplaining its arousal.
What's wrong with my computer?It looks like your hard drive went soft
An Erection is a standing ovation to your glorious sexiness.