There was a story about a guy who had his assistant suck his dick during a negotiation, and then offered her services as part of the negotiation. If you could point me in general to guys getting serviced while doing other stuff and generally not paying attention to the service that would be cool too.
Source: reddit.com/r/sexystories/comments/6ep886/request_im_looking_for_a_story_but_maybe_you
Sounds kind of like /r/freeuse