I thought I had it all under control. I have had sex during my period before with the assistance of a fantastic product recommended to me by Amazon called a Beppy. It's an artificial sponge that has been shaped to sit over the cervix and collect the blood, it has a hole molded in one side that you can hook a finger into to retrieve. Beppys even come in a lovely 'wet' variety that have a nice smelling lube that makes it easier for insertion and kind of cleans as it goes in. Wonderful product. Not sold in New Zealand (I'll probably buy them online and get them sent over... it's worth it).
I had a menstrual sponge which I thought was the same. Mistake. Firstly the sponge was natural so it was inconsistently textured and not as dense at the beppy, therefore it couldn't hold as much blood. Secondly it wasn't as soft as a beppy and I thought it might have been felt by the clients. and thirdly there was no hole, it's a sphere, which meant the easiest way of getting it out was to pry it way from the sides with the tips of the fingers or use an opposable thumb... thumbs are much shorter than other digits and this is not an easy task. Removal involved squatting at the bottom of the shower attempting to retrieve this elusive device that had been pushed way, way up there. Fortunately the heavy bleeding meant the sponge was full of liquid and easier to retrieve. If I couldn't get it out I would have had to had a bath to fill it with water and dig it out then. It's a messy and unglamorous business. Of course done only after the client had left the room.
I had two jobs, both lovely men, and at the end of both jobs there was blood on the end of the condom. Eugh. On both occasions I swiftly move in and removed the condom, folding into a tissue before they noticed. During orgasm a part of the brain shuts down, there's an interesting article about it on How Stuff Works. So while they slowly recovered full brain function it was not too difficult to sneak that past the clients. And there was no blood anywhere else so I think I managed to get away with it this time.
What I have learnt for next time: 1. Avoid working during the heaviest time of my period, 2. when using a sponge only put it in just before sex, use a tampon for the rest of the time and 3. get some Beppys from Europe.