What proposal did Bloom, diambulist, father of Milly, somnambulist, make to Stephen, noctambulist?

To pass in repose the hours intervening between Thursday (proper) and Friday (normal) on an extemporised cubicle in the apartment immediately above the kitchen and immediately adjacent to the sleeping apartment of his host and hostess.

What various advantages would or might have resulted from a prolongation of such an extemporisation?

For the guest: security of domicile and seclusion of study. For the host: rejuvenation of intelligence, vicarious satisfaction. For the hostess: disintegration of obsession, acquisition of correct Italian pronunciation.

Why might these several provisional contingencies between