Once a guy's paying, there's no more sentimentality or intimacy to it than would be attributed to any other object. Men just aren't wired that way (for the most part). Ask most guys who've ever gone to a whore to look deep into themselves, they'll almost to a man admit that they should have just saved the money and cleared the pipes themselves... this statement ignores people with real sexual addictions/compulsions of course.
If we're talking $1,000 an hour girlfriend experiences, that's something else entirely.