Union
$$A \cup B =$$
{ aesthetics, belly, ears, ethics, eyes, feet, hands, head, logic, mouth, thighs }
Symmetric Difference
$$A \ominus B =$$
{ aesthetics, belly, ears, ethics, eyes, feet, hands, head, logic, mouth, thighs }
Difference
$$B - A =$$
{ belly, ears, eyes, feet, hands, head, mouth, thighs }
Cartesian Product
$$A \times B =$$
{ (aesthetics, belly),
(aesthetics, ears),
(aesthetics, eyes),
(aesthetics, feet),
(aesthetics, hands),
(aesthetics, head),
(aesthetics, mouth),
(aesthetics, thighs),
(ethics, belly),
(ethics, ears),
(ethics, eyes),
(ethics, feet),
(ethics, hands),
(ethics, head),
(ethics, mouth),
(ethics, thighs),
(logic, belly),
(logic, ears),
(logic, eyes),
(logic, feet),
(logic, hands),
(logic, head),
(logic, mouth),
(logic, thighs) }
Charles Sanders Peirce