I'll be honest with you. I'm not sure what the beginning of Leviticus Chapter 15 is talking about, but I think they're talking about men's ejaculation. They call it the "running issue". One thing's for sure, they're not talking about jogging magazines.
They might be talking about some sort of gonorrhea, too. But most of the resources I've looked up say it is about ejaculating; particularly 'wet dreams'.
Basically, if a guy gets a little bit of jizz on himself during the night, the bed he laid on is unclean and anything he sits on until evening. And, if someone touches his bed, then THAT person is unclean, too! And by unclean, I don't think they mean physically; the implication is spiritual uncleanliness, or sinful. During normal sexual intercourse, both are considered unclean until evening.
The Israelites sure are anal with their superstitions! But the basic message is right, if you dig past all the unnecessary rituals. Guys or girls, if you get cum on you - wash it off. It is pretty damn gross to be walking around with cumstains on your pants and hands.
I'm not sure what kind of commentary I can add to this. In reality, we can argue that a person with semen on them is physically dirty, but are they spiritually dirty? I guess if you feel guilty for doing it, you are. And if someone is touched, or touches someone that has semen on them, are they dirty? I'm not sure if I want to delve to deep into this topic, so I'll stop. But I'd be interested in your comments.
Women, according to Leviticus, you are filthy! When you are menstruating, you are unclean during your period (seven days), AND for seven days after that! And if a man should have the audacity to have sex with a woman on her period, he too is unclean for seven days. After the eighth day AFTER the period, a woman must go to the local priest and have him sacrifice two small birds.
Chapter 15 covers some disgusting and unnecessary topics. I don't want to continue this discussion, but here's an interesting quote:
Leviticus 15:8 - "And if he that hath the issue spit upon him that is clean; then he shall wash his clothes, and bathe himself in water, and be unclean until the even."
Spit? Nah. They can't be talking about that. Can they?