Nightmares about being trapped in prisons will eventually lead to sex. Drinking, eating, driving, working or camping will eventually lead to sex. Despite the fact that his spirit guide is a panther, Jim is allergic to cats. No one drinks beer out of a can. Blair and Methos both hate the cold.
All males are capable of multiple orgasms.
Mutual dislike leads to fantastic sex. Vulcans DO have feelings. Computers can have sex. Impetuous pilots and cowardly thieves make a very good pairing. If one of the duo has to dress in drag, it's always the biggest, most macho of the two.