The tightening of the urethral sphincter to prevent the flow of urine. Increased blood flow to the penis constricts the urethra so you don't piss yourself in your sleep.
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Get the Wicked Boner mug.When she's on her rag, & you pullout... Then you refuse to wash it off & ask her if she "would like a pickle w/ that." Her name also has to be Mary.
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Get the personality boner mug.Hed spent days making sure everything was just right. As he completed the project and stepped back to admire his work he was overcome with an OCD boner
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