I'd argue the opposite; I've found it to be very positive to travel and host with AirBnB and CouchSurfing when it comes to, ahem, the opposite sex. Friend-of-a-

I'd argue the opposite; I've found it to be very positive to travel and host with AirBnB and CouchSurfing when it comes to, ahem, the opposite sex. Friend-of-a-friend might get awkward, but then again, that's never stopped us either.