In the course of this particular story Captain Pike is made to relive certain of his experiences, and one of them is of watching an Orion slave girl dance. It is very clear that the Captain finds her alluring. But stop and think about what is going on here. A captain whose culture values freedom and has eliminated want and need finds stimulation in watching a slave being forced to perform in an blatantly sexual manner. Keep in mind that by the words of the show (Episode: Bread and Circuses) that Star Fleet officers have to undergo psychological testing to see if they are fit for command. Apparently finding slaves sexually stimulating isn't disqualifying. And we're not talking about psychological testing that is practiced today. No, we're talking the 23rd century where psychology is so advanced that only a handful of individuals remain who aren't treatable for psychological problems (Episode: Whom Gods Destroy). The plain and simple is that the Federation simply doesn't care about what depravities exist in the minds of its officers so long as they get the job done.