I can see why you'd have a problem with it, if you're boyfriend didn't like the idea, but not only does he not mind the idea, it's one of his fantasies!!! Yes, he may try it and decide he didn't like it after all, but discuss it with him, before hand so that he knows to be sensitive with your feelings if he decides it isn't his thing after all.

My ex and i started having sex while i was on because we were lying masturbating each other, talking and fantasising about how much we wished we could be fucking each other, if it weren't for my period. In the end we were just so hot and desperate to fuck that we just threw caution to the wind. Any self consciousness just melted away after that. Just be careful not to drip on the carpet when you get up to go to the bathroom!!!!!!!!!

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'Don't knock masturbation - it's sex with someone you love'

- Woody Allen