Unfortunately it is a proven fact that men cheat more than women. Women are not angels by any means and of course, there are some women out there that cheat just as often as men do.
1. men cheat because they have the feeling they are in some way not getting the emotional support for their partner that they deserve. Women are usually in the mind that if their husband is unhappy, give them sex. Although I’m sure the men in our lives are not complaining about the amount of sex we are giving them, they also need to feel that they are appreciated for their efforts. For most men, their goal is to provide a safe and loving home for their family to share with them. The stress of this can sometimes be overwhelming for them and a little affirmation that they are doing a great job taking care of the family goes a long way.
2.He also cheats bcos she doesnt look or dress the way she used to 5yrs  ago
If your a stay at home wife/mother it is so easy to get yourself into a daily routine with the house work and kids and find yourself wearing a comfy pair of sweatpants all day. Or maybe you are a business woman by day, that all you want to do is get home and put on your stretchy pants and t-shirt. I’m sure there is nothing more a man would want than to come home to his wife standing at the sink doing the dishes in her Lingerie, but the trdefinitely help to keep the spark alive. He had to have been attracted to you in the first place, so every now and again, remind him why he fell in love with you!

Well of course they do, but so do women.