What kind of consequences he can expect:
The great thing about Cosmopolitan is that it regularly features both relationship red flag articles and "how to get back at him for cheating" articles. So, say this man's girlfriend listened to the former (that is, that her man is cheating because he can really paint a picture with words). Now she just picks up the next issue and figures out what to do about it:
"Resist the urge to break up with him until the day of his big meeting -- then give him a Sharpie mustache right before his alarm goes off."
There's no way your co-workers will notice.
As if work hasn't been stressful enough as it is, our hypothetical man's reward for talking to this hypothetical woman who obeys the mighty word of Cosmo about all the crap he deals with at work is ... more crap he has to deal with at work. Now he's stuck at the office looking like a 16-year-old trying to eke out his contribution to Movember.