Are there "rules" for a glory hole?

I know what a glory hole is, that is not the question.
This weekend found me in a rather seedy location (don’t ask), and there happened to be a glory hole present. A some point somebody stuck their fingers through the glory hole and wiggled them around. I assume this was some kind of signal, but do not know if the person was looking to give or receive pleasure. But this leads to my actual GQ question:

Are there a set of widely known and/or agreed upon signals or signs to determine who sticks what through the wall? Is there a written or unwritten code that most adhere to? Or is it just an anything goes, caveat emptor part of society?

No teeth.

from http://www.sexuality.org/l/sex/glorhfaq.html

You can find other “rules” at the same site.

Rules? Doesn’t that kill the romance?

Well, most Gloryholes are illegal due to indecent exposure and other sex in public laws.

True, but most illegal activities have agreed upon rules of conduct. Gambling, prostitution and drug dealing are all illegal activities but participants in these activities know they are expected to behave and react in a certain manner, and willingly do so to keep the activity going.

We’re not talking about a gold mine here, are we.

Nor a glass-blowing operation, though there is a relevant gerund in the phrase…

I was thinking mining too.

Is this site work safe?

Big B/W banner on top that reads “SEXUALITY.ORG” “society for human sexuality” and “gloryholes FAQ” in a relatively big font. If you manage to scroll down immediately AND you know nobody is going to examine the text on your screen closely it’s okay. Only black text on a white BG.

Probably not. I don’t see any overt pornography but there is a watermark graphic that’s kind of non-mixed-company safe…

It is an all plain-text site, and there may be a word or two that would set off a filter.

I would also say that this site completely answers my question. Nicely cited, Gfactor!

Er…not mixed-company-safe. I got my hyphens shifted. (<----- not a euphemism)

Which is why I didn’t make it a link. C’mon; It’s about glory holes. I wouldn’t recommend reading it at work. Then again, I did. I’ve asked the mods to disable the link to the site in FormerMarineGuy’s post, just to be on the safe side.

Oops, sorry. I forwarded the link to my home e-mail account for later ‘research’.

Rule 1. The proffered member shall not be construed as a surface for graffiti.
Rule 2. Glue, paint, spirit gum, and rubber cement shall not be used.
Rule 3. If offered a member, please do not participate you have recently been eating jalapeños.
Rule 4. It is customary not to hang one’s coat or scarf on the proffered member.

Ahh. Wasn’t sure if you were whooshing or really curious. Sexuality.org isn’t a porn site and doesn’t have many photos or illustrations, but the domain name itself and much of the content could get you into trouble at work.

I am actually very curious. The same curiousity as when one passes an ugly accident and is forced to slow down to take a peek at the dead bodies. Apparently this site takes glory holing mighty seriously.