If you knew what you do   When no one's in the dark room but me and you, a brilliant disguise   It's the taste of the chase   I do confess, it's the mess that feels so right      Come on a Monday, come on a Tuesday   They'll never know   Pop off a cork for Wednesday, play with me Thursday   But you'll always be his girl      Come on a Monday, come on a Tuesday   They'll never know   Pop off a cork for Wednesday, stay with me Thursday   But you'll always be his girl      His girl Friday, his girl Friday, his girl Friday   His girl Friday, his girl Friday, his girl Friday      Just a kiss he won't miss   I know you're gonna miss this as long as you live when you were mine   Bite your lip, pull me in, it's not the sin   It's the mess that feels so right      Come on a Monday, come on a Tuesday   They'll never know   Pop off a cork for Wednesday, play with me Thursday   But you'll always be his girl      Come on a Monday, come on a Tuesday   They'll never know   Pop off a cork for Wednesday, stay with me Thursday   But you'll always be his girl      His girl Friday, his girl Friday, his girl Friday   His girl Friday, his girl Friday, his girl Friday      If you knew what I knew   He'd thank God it's Friday   As I look on with you      Come on a Monday, come on a Tuesday   They'll never know   Pop off a cork for Wednesday, play with me Thursday   But you'll always be his girl      Come on a Monday, come on a Tuesday   They'll never know   Pop off a cork for Wednesday, stay with me Thursday   But you'll always be his girl      His girl Friday, his girl Friday, his girl Friday   His girl Friday, his girl Friday, his girl Friday   His girl Friday, his girl Friday, his girl Friday   His girl Friday, his girl Friday, his girl Friday