Why do I reject physical contact before my period?

I've just this minute notice that I enjoy a cut-out where on earth I reject physical contact from my boyfriend a couple of days up to that time my time of year. I catch irritable, moody, everything seem to stink and I don't want to attain physically close beside my bf. I don't want sex or to cuddle, no caress, nil. I even concentrate more on his flaws. However I'm subsidise to person usual after my extent. I know roughly the PMS irritability, but why do I reject my bf?
Answers:

Puberty request for information?

hormones suck

I havent have my extent since August 24th, 20048th echelon am i ok?

Just because most likey you surrounded by anguish and wanna be disappeared alone.

A womens cyle..interview?

It's in recent times mood swings. And your hormones. I do it too. Maybe you are a moment ago worried going on for what he will have a sneaking suspicion that or something? Its typical!

my eyes blackout?

you probably simply dont want to be bothered

Is it ok if i hold sex near my girlfriend when shes on her length?

OH MY GOD. I AM SO GLAD I AM NOT THE ONLY ONE.

I know that wasn't a indisputable answer, but hey it help to know you're not alone, right?