A liar is a liar. We have advertised for men over the years, and prefer married men with either their wifes approval or presence (they do exist believe it or not) but the amount of men who want to happily cheat behind their wifes back is incredible. So, these men that will happily cheat on the 'love of their life' and mom of his children lie to her, but be totally honest with us ie: std's past or present, valid std tests etc. is unlikely.
We know men who love fucking married women when the hubby has no clue, and they feel and know its not right, but are addicted to the ego rush and figure its the wife living a lie not them.
One gent we know has told me, he can get as much hot young pussy as he likes on Tinder... but give him a soccer mom, in her house, in her bed with family photos on the mantlepiece while hubby is busting his guts at work for her, and he is in nirvana. He is addicted to the ego sugar hit much more than her middle aged pussy.
He knows it *******, and would hate it to happen to him, but he figures, if he doesn't fuck her someone else is going to... so I guess anything can be justified in the end.