9 Ways to Prevent Your Boyfriend from Cheating

6. Leave a leaflet from a detective firm on the table, and say “I found this in our mailbox”

“This is my way of hinting to my boyfriend that ‘I will find out if he ever cheats on me.’” Guys might resist their urge to cheat when they know that there are “professionals” out there who can catch them. You could increase the number of leaflets you leave on the table every time your boyfriend does something suspicious. This could be an indirect way to encourage your boyfriend to exert some self-control.