1.   No longer interested in sex.
 

  2.   Finding new email addresses.
 

  3.  Smelling freshly showered when arriving home.
 

  4.  Receiving anonymous calls alerting you that your spouse is having an affair.
 

  5.   Make-up or lipstick on the collar.
 

  6.  Hanging out with new friends.
 

  7.   Having a second cell phone.    
 

  8.   Interested in a new style of   clothing.
 

  9.   Leaving during an argument.
 

10.   Hiding or protecting the whereabouts of a cell phone.