Just a question that occurs to me.. I would be very dissapointed if I scheduled with a girl.. looked forward to it for days.. maybe weeks and then she was having her period..I realize.. sometimes stuff happens.. but then should the visit be re-scheduled? What is the expectation?

Like everything about the hobby, this is a YMMV situation. Some providers will cancel others won't.  I've been hobbying awhile and seen it all.

Out of respect to the gentleman and due to to our mood.. Some women are not very pleasant to be around while on their period. We can actually predict when this could happen so tentatively those dates are blocked just in case.

It's usually the ole "OMG, my period started" during FS" crap too lol. I have never worked or even been surprised by my period...in six years. Women who do that are ignorant when it comes to money mgmt. and nothing more.

Some women don't get periods due to the kind of birth control pills they are taking.  Other women?  Well I'll be willing to bet a majority of them have found a way to deal with their periods while working and you would never know they were on one.