There are four kinds of sex:

HOUSE SEX: You and your spouse are newlyweds and you fuck all over the house.

BEDROOM SEX: You and your spouse have been married for a few years, have settled down, and only fuck in the bedroom.

HALL SEX: You and your spouse have been married for fifteen years and say, "Fuck you!" when you pass in the hall.

COURTROOM SEX: You and your spouse have been married for twenty years, your spouse's lawyer fucks you out of everything you've got.

Source: Sex jokes