Bingo Sex

A sexual act in which you tape a bingo card to a women’s back and proceed to screw her doggie style. During climax you pull out and shoot on the back of the women and onto the bingo card. If you happen to connect a line you yell out bingo while slapping the woman's ass.

1) when you have sex 5 days in a row

or
2) when there are 31 days in a month and you have sex the same day of the week 5 times in a row in one month