7. When you say “Personally, I don’t know, but according to my friend they just give in to temptation,” when your girlfriend asks, “Why do guys cheat?”
When your girlfriend asks an awkward question, offering your friend’s theory (“According to my friend…”) will not make you sound very trustworthy. She will know that you are actually stating your own opinion, but under someone else’s name. Even if you really did get the information from your friend, be careful how you reply, because your girlfriend might be suspicious.