All of the clues are puns that may sound dirty on a first hearing, but actually refer to clean solutions. For example, the correct answer for the clue "The more you play with me the harder I get" is "Rubik's Cube."
Puns in the clues are clever uses of language that initially seem risqué but actually refer to pure meanings. The correct answer for "The more you play with me the harder I get" is a great example, as it's an expression that sounds provocative at first but actually refers to the increasing challenge of solving Rubik's Cube.