When in a public restroom. You must NEVER make eye contact with another guy. It is not decent, and eye contact defiles the sanctity of the public restroom. Eye contact leads to conversation, which is another definite taboo in the sanctity of the male public restroom. Under no circumstances may you make eye-contact with another person (male or female), for whatever reason. If you do, accidentally, make eye-contact for whatever reason, simply do the head nod (ala How I Met Your Mother: simply tilt your head up about 5 – 10° and then back down to the original position) and then return to looking somewhere, anywhere else.

Conversation in a public restroom is also strictly forbidden. Anything that you have to say to another guy in the restroom can be said anywhere else. Especially if you somehow manage to bump into somebody that you know. You shouldn’t be able to recognise them anyway, because you didn’t make eye contact in the first place right?

If you somehow do make eye-contact, accidentally, and after the head nod, if you find that you recognise that person, a BRIEF smile will be more than enough greeting. No handshake, because that would mean physical contact, which is even more taboo than eye-contact or conversation in the restroom.

So, to review:

• No eye contact
• No conversation
• No physical contact