i'm a certified cheater, pagka sakpan, my gf broke up with me, and it got me saying, "what was i thinking...!?"
basically here are a few things that got me into this mess:
1. peer pressure, hanging out with the guys and eventually taking a girl home from a bar
2. office temptations. sometimes some girls are flirting and i didnt dare to say NO.
3. peer pressure again. i had the chance to cheat only, only when i'm with my BOYs. so maybe, maybe girls be extra careful when ure bf asks for " a boys night-out"

but hey, this is from personal experience and i'm not speaking in behalf of the cheating public
PS: kung wala pamo masakpi hinay hinay nalang mo ug usab. i never recovered after my gf broke up with me. i lost a bunch of mutual friends too..