I'd propose an "Acceptable environments" section, to differentiate houseboys who would accept a working arrangement from those who are simply looking for a companion. That is, if working for a gay couple would not be acceptable, the section should indicate that the houseboy is NOT interested in such an arrangement. This might work simply as a set of checkboxes, e.g.
Gay couple, companion
Gay couple, employee only
Single man, companion
Single man, employee only
It might also help for the Compensation section to indicate MINIMUM requirements, instead of everything the houseboy would accept, if offered.