Most breakups are announced on Mondays, most breakups occur right before Spring Break and right before Christmas.

This is one of the random facts Berit Brogaard D.M.Sci., Ph.D posted in Psychology Today.

Read the complete list here, but we’ll give you some of the facts we found interesting.

  • bouquet-1276847_960_72015 percent of women in the US send themselves flowers on Valentine’s Day.
  • Speed dating was invented in 1999 by a rabbi in L.A. as an extension of a Jewish tradition of chaperoned get-togethers of Jewish singles.
  • 59 percent of people remain Facebook friends with an ex after they’ve broken up, according to a YourTango survey.
  • The phrase “hook-up” was first used in Nena and George O’Neill’s 1972 tract, Open Marriage.
  • According to a study from Loyola University, Facebook is blamed for 1 in 5 divorces, and it’s the primary source of online evidence.
  • Condoms were invented in Egypt 3000 BC and were probably made of animal hide.
  • In Colorado, it is illegal for a man to kiss a woman while she is asleep, according to realpolice.net.
  • The world’s oldest prostitute was 82 years old in 2001.