yes they are...they're more noticible for girls cause of the whole "PMS" stuff....but it DOES happen to guys...just on a much longer term.
You might feel depressed for like 4 nights in a row, you might turn emo, you might start to smoke pot....etc
Your a bit weaker emotionaly...but deal with it well and you'll be good
"Love is patient, love is kind. It does not envy, it does not boast, it is not proud.
It is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs.
Love does not delight in evil but rejoices with the truth.
It always protects, always trusts, always hopes, always perseveres.
Love never fails. "
-1 Corinthians 13:4-8