The old men are expected to take sleeping pills and share the bed for a whole night with a girl without attempting anything of "bad taste" like "putting a finger inside their mouths". Eguchi is presented with a different girl each time he visits the house because of the short notice of his visits.
The elderly men are anticipated to take sleeping pills and share a bed with a girl overnight without engaging in "unacceptable" actions such as inserting fingers into their mouths. Eguchi is given a new girl each time he visits the house due to his sudden arrivals.