[quote=Etcetera]
Virgin? Male? Impressive.
[/quote]

He'd fall in the 0.0000000001% of the population that fits those qualities. ;P

[quote=Protagonist]
There'd quite probably be a lot of that going on in this world.I'd assume the term might be something like 'domestic partner'? Maybe 'Housemate'?
[/quote]
Housemate might be a good term.