Here's the whole line item in Uber's e-mail:
> 4) Do not have sex with another employee UNLESS a) you have asked that person for that privilege and they have responded with an emphatic "YES! I will have sex with you" AND b) the two (or more) of you do not work in the same chain of command. Yes, that means that Travis will be celibate on this trip. #CEOLife #FML
First: This is completely inappropriate to bring up in this way in a work environment.
Second: When it comes to sexual harassment issues in the workplace, women are the main victims, which is probably why the Guardian reporter wrote that sentence as they did. Not only does this text give a green light to very questionable behavior (which will mostly or entirely be perpetrated against women by men), but it also implies that CEO Kalanick -- someone employees might take as a role model -- has and will continue to have sex with underlings, but just not on this trip.
Yeah, it's probably a joke. If so, it's a dumb and inappropriate joke. And Kalanick was 37 when he wrote this. Not 22. Not some newb CEO. 37.