your lucky! My boyfriend is constantly wanting to discuss what i do at work. I feel that it is of no constructive use whatsoever to do so but still he persists.
Whatever form non-monogamy takes, different people have different boundaries.
So some people are fine with their partner having casual sex with other people, but don't want them to have a 'relationship' with anyone else (at its extreme, 'never with the same person twice'). Others don't want them to have casual sex, but..
Some people don't want their partner to have sex with men, others want it to be only with men, and some people don't care.
Some people have rules like 'other partners only when I'm with someone else / not in the same city / we're having a threesome (or moresome)' etc.
Some people place limits on the types of sex that are ok and, more relevant to here, some people are fine with their partner keeping quiet about what went on, while others want to know all the squelchy details.
To you, it's 'work'. To him, it sounds like it's a bit more than that.
If he's worried about you enjoying it physically -
you might want to leave for the guy who can do that!! - then, if you've got some reviews, you could try showing them to him and telling him what it was
really like: 'she came in seconds' is usually a review of acting, not reality...