Quite a few things actually if you are absolutely keen. You have the choice of finding sexual partners who don't have an issue with getting freaky while the lady is having her monthly visitor, or using various barrier methods to keep leakage and embarrassment at bay.

If you choose the latter however, you should do thorough research to ensure that the method you choose (sea sponges and diaphragms seem to be the most popular) is not going to be detrimental to your health (your cervix is most susceptible to allowing germs in during your period). If it's just too much effort for a bit of fun, then go with the first suggestion.

You'd be surprised how many guys are OK with period sex so you can but try adding yourself in DateFinder and discreetly commenting that you are totally DTF but that it's that time of the month. Or just mention that fact when people start messaging you about your date.

If you find a willing body, make sure the sex is safe (for the above reasons as well as the obvious) and have towels around just in case. If you use tampons, perhaps consider leaving it inserted until you're ready to do the deed. How much fun you have will depend on the comfort level of your playmate so let him do what feels OK for him.