A brand new character for a brand new scenario in the Star Schlock universe I'd like to do someday, working title "Sapphos VII Need Men!"
In it, a stranded Yeoman Deedo finds himself captive of the planet's secret inhabitants, the Milfesians, a highly sexual female-only race that was almost wiped out by war millenia ago as other space powers sought to subjugate them. Their civilization now thrives in their undetected cities. However, security requires that any visitors must be kept as a "permanent guest"... and as a female only race, males who can help propagate the species are a hot commodity!
Such "guests" are assigned a permanent supervisor who provides for their needs and provides a living space (a bed to which they are restrained), and organizes his schedule to provide a regular weekly rotation of Milfesian (usually friends or others from the supervisors social circle) eager to breed. The Milfesians' technology ensures the male is always physically ready. The Milfesians are genuinely fond of their males, often staying in touch and sharing information about the progress of their pregnancies, etc.
Pictured in this pinup is the Annalist, a special employee of the supervisor in the story. She is not on the rotation, but is tasked with holo-recording the daily sessions for general distribution as educational (and entertainment) materials for the general public. Besides the supervisor, she is the Milfesian the captive Deedo sees the most. I think she's taken a liking to him...