I love you, but i slept with someone else �.O ?

Sometimes a person cheats even when he/she is in a happy, perfect relationship. If the opportunity is there , you just take it. I know it one has the choice to cheat or bot, but for some people it just feels like an instinct. I don't think that by doing it its because you have low self esteem. Also, there are people that say - ones a cheater, always a cheater- and I believe its not true. Cheating is an act, you have to have an elaborate plan sometimes. Its a choice. I think its in the genes.