While I have to agree with some your answer, I'm not sure you addressed the second part of the question? You merely said it was a bad idea. Pointing at things and saying "Bad" or "Okay" doesn't address a larger concern, I think. It is entirely possible, perhaps, to be more intimate with a stranger than with your romantic partner. If we can't occasionally hold hands with a stranger (when it feels right) because it's "bad", is not the individual oppressing him or herself, missing out on a chance encounter of intimacy (always and yelling "Bad!" without taking the moment for what it is). Don't we have these kind of intimate moments all the time? Isn't there something more wonderful and exhilarating about a stranger's warm thigh against yours while you are crushed in a bus than the habitual sex with our romantic partner? A definition of intimacy then might be those moments that leave us in awe and wonder, an encounter free of the taboos and commands of society at large. I think the fact that we secregate intimacy to the bedroom is the problem in this question. Or perhaps I am miles away. I'd love to hear more. "The flash-fires of erotic excitement are kindled by frail and fleeting epiphanies. You, the compleat suburbanite, white Anglo-Saxon Protestant, were in a corridor of the airport between plane changes, and abruptly an African woman pushed you against the wall and kissed you in the mouth: it electrified you for days like nothing your ever-available and compliant wife could ever do to you. How the carnal smile that waiter flashed you in Oaxaca obsess you! How your body is blazing from that brief kiss the young Mexican salesman gave you in the dressing room of the department store!” -Alphonso Lingis, Dangerous Emotions