CARNAL NATION

I think it's great that you're conscious of rejoicing in womanly cycles and all, but you don't need to push yourself to be somewhere you're not. Some people really LOVE messy sex—cum and lube and blood and spit or even whipped cream and caramel and Kama Sutra honey love dust and edible body paints—and some people just DON'T.
 
I'm not a big fan of mess myself, but I don't mind fucking a girl while she's bleeding.  Sometimes when I'm bleeding, I find it to be the time of my cycle when I most want to get fucked. I tend to be fairly conscious of my sheets, though, and often do put towels down.  I have also requested taking a shower together so I won't be thinking about where the mess is going.  I know it's perfectly fine washing down my legs with the hot water, and we'll clean up quick and easy afterward.
 
So are there ways that the mess could be made into a non-issue? What if you put towels down? What if you were in the shower? Would it be more comfortable in either of these circumstances?
 
Maybe not.  And y'know what?  That's okay.  Just tell whomever you're sleeping with that you prefer not to have sex while you’re bleeding—that's a personal choice and totally okay. If your partner pushes you to rejoice in your womanly cycles or assures you that he or she (or they) doesn’t mind the mess, well it's not about that.  It's about you, and what you want, and how you feel comfortable and sexy. That is perfectly okay.
 
All that said: I still DO think it’s important to rejoice in your womanly cycles! So don't stop asking yourself how it is that you can feel good about the things your body does naturally or how you can make it into an intimate, sensual experience instead of something full of shame and disgust. You should NOT have a "toxic hazard" sign on you, but an "I don't want to be touched" sign would be perfectly valid.  It’s just a slightly different way to look at it.