A "definitely not gay" gay sexual activity between two bros wherein a man stands over a second man who is kneeling while both parties are nude. The first man then takes his genitalia in his hand
like a hammer and uses it to beat on the second man's
forehead, as though he were a
nail, until the first man reaches climax. This activity comes with the unspoken rule that the bros never make eye contact, lest the activity becomes homosexual in nature.