reason why people cheat in relationship

When person fall in love for first time with someone, 

their is certain chemicals that are released in body that 

provide one with the feeling of ecstasy, pleasure,

 joy, excitement attraction. But with time these chemicals 

disappear and the feelings of love are felt with intimacy 

and closeness instead. When a person meets another woman 

other than his girlfriend, he may finds her more attractive. 

Once again these chemicals are released once whether he

 is a loyal or not. This situation is a critical one. At this 

point of time disloyal person will go for the new relation 

while honest people avoid giving into such feelings of

 attraction. People who don't understand this concept 

might cheat When this happens to a cheater he never 

realizes that the attraction he feels towards that person

 results from the hormones that are released in his body

 but instead he thinks that he loves that new person more

 than his spouse. Cheaters might say something like: 

 I experience new feelings when i see her that

 i don't experience with my wife anymore 

 I am more motivated to see him than to

 see my husband . I never seem to get bored of her.