It is not very fun to travel alone. I can do it, mind you (I can do anything), but there is no one to hold your bags while you go to the bathroom. Instead you look like an half-wit wheeling your carry-on suitcase and ridiculously overstuffed backpack into a narrow stall, all the while suspiciously eyeing every other person in the restroom as if they were potential pick-pockets. Suffice to say I'm a little paranoid about my belongings, a tendency only aggravated by overhead announcements: "Please keep your personal belongings with you at all times" (Which, to me, always begs the question, what exactly are 'impersonal' belongings?).
Life is good with a bendy straw.