As with any of the questions on this site, if you don't like the tone of the question, or if you don't have anything to offer, MOVE ON! No one forces any of us to read or respond to any questions... that's the lovely thing about this site. So for those of you who feel these kinds of questions are intrusive, or gross, DON'T READ OR COMMENT!
Anyhow, back to your completely legitimate sincere question...
My fiance couldn't care less if I'm on my period. He says that's what the shower is for. I am a little more squeamish about it, but if I'm really feeling it, I'll do it. We just limit things a bit more, of course, and some positions are off the table, like me on top. Yucky.
I also wanted to second what Dori said, though. If you would like to try sex during your period, but you are uncomfortable with the blood factor, definitely try the INSTEAD SOFTCUP. It is PERFECT for this situation. It does resemble a diaphragm, and it does prevent any leakage of blood during sex. It even says on the box that it can be worn during sex. I've tried it, and had no leaks at all, and neither I nor my fiance could tell it was in. You can buy them at any major drug store, or walmart, target, etc. There is a little learning curve to using them as they are unlike the typical forms of period management we are used to, but they are really quite wonderful! Also good for swimming, or long days where you don't want to be changing tampons/pads all day, as you can safely leave them in for 12 hours, and without leaking in most cases. You have to get used to removing them, as that can be a little different/messy, but not a big deal at all, just different than what we're used to.
Sorry to go a little off-subject on the Instead Softcup thing, but I just really do think they're neat!
And for the record, I know what AF is, and I totally got what you meant by Mommy Massage Parlour... not sure why that was so confusing to some people...