When people begin to start having affairs, they become very conscious of their appearance. From their hair to their body weight, there will be something that they want to change or improve upon. You might notice your partner spending more time getting ready before they meet their 'friends' or they'll be spending a lot of time in the gym, but you're not the person who gets to see how much their stamina has improved. You're also not the person that they're getting dressed up for.