cocksmanship: Surely this word has been around for a while, but I just heard it today in the 1976 movie Network. If swordsmanship is how well a man handles his sword, and penmanship is how well a man manipulates his pen, then cocksmanship is, well, you get the idea. It's a perfectly usable and fun word for a topic that one probably shouldn't be talking about anyway.
Joey "Three Legs" Manolo had long hoped for career in the adult entertainment industry, but his cocksmanship just wasn't strong enough to land him a lead role.