Well, answering as a man, he is probably telling the truth. It is certainly would be plausible that a call girl may have been directed to his room by a co-worker.
As to the "boobs" that is a little more complicated. If an individual woman were to come up to me in a private setting and make that offer, I would definitely decline since that is not a type of behavior that I would consider "normal;" and I would be suspicious of her motive.
But if a woman choose to wear a jacket made of clear plastic and nothing else above the waist and then sit at a bar for about an hour before management decided she was attracting too much of a crowd (of men) and then asked her to leave, I would neither leave if I were there nor refuse to come in if she were there already.
As you might guess, I was there when this actually happened about 35 years ago at a Steak and Ale restaurant. I didn't stare, but I did not avoid looking at her. I was there; I was at a table; I was there before she came in; even if I had wanted to stare, there was a crowd of men around her that would have blocked my view anyway.
There are many reasons why a male is attracted to "boobs." Heterosexual men are wired that way. We are hard wired to find mates; and we seldom get to see them except in pictures.
So that is a really effective way to get our attention---at least for some minimal amount of time.