sponge advice
I couldn't find any info online about this but from personal experience have learned a bit. I have no idea how to wrap my old 'bleedin' from the crotch' thread so here's a summary of the relevant info.
First off, i choose not to work during this time...lots of girls do but it's not for me. You're not at your best for your client and it's a healthy break for you and your body. However, if you decide to go for it, here's what i've learned...
Sponges, be they makeup, sea or the elusive 'today' contraceptive sponge are the most common things girls use. No they don't fall out but the downside is that they shouldn't be up there in the first place for that purpose and secondly, they're a bitch to retrieve if you f=ck deep and hard like me. The today sponge has a loop to pull on which makes extraction easier but it's also loaded with yummy contraceptive foam which i can't imagine enhances daty. Also, they can break and then the party's really over. Today sponges are especially easy to break...even before insertion...and they're $5 a pop. If you decide to go this route with any of these sponges, just make sure you take the damn thing out right after the deed is done...and don't even consider making one do double duty for multiple clients.
Some girls use tampons as a barrier method...i think a guys cock would definately feel that as opposed to a sponge but atleast it's made to be shoved up there. Just tuck the string up there as well.
There is a product
www.actiontampon.com (i think that's the url) that's made specifically for sex while you're having your period. It's not cheap and is available by mail order only. Maybe encourage your local adult store to get them in.
Hope this helps.