A man cave[1][2] or manspace[3] is a male retreat[4] or sanctuary[5] in a home, such as a specially equipped garage,[6] spare bedroom,[5] media room,[7] den,[8] or basement.[8][9] The term "man cave" is a metaphor describing a room inside the house[10] where "guys can do as they please" like a caveman, without fear of upsetting any female sensibility about house decor or design.[11] Paula Aymer of Tufts University calls it the "last bastion of masculinity".[11] The phrase is thought to come from the 1993 publication, Men Are from Mars, Women Are from Venus.[12]