having trust issues?

my husband is starting a new wrk place filled w a lot of asian women. i am feeling uneasy about it. he has a thing for asian women and whenever he sees one, hed check her out like a dog. hes cheated on me once when we were still dating, he said as long as i have no clue he cheated, its ok. he also cheated on both of his ex, when he was deployed. and he tried asking her friend for sex, and tried getting into a cowkrers pants. i just knew all this cheating on his ex and one me, when i married him and have kids already. and he hasnt shown any signs of cheating, been 5yrs. however, hes became secretive w his phone and email. i feel like what makes me think he wont cheat again? i feel like hes going to find someone hes attracted to and try to get in her pants like how he did w the other one. he also told me guys and girls cant work together because one will seduce another and itll lead to sex. thats why he never wants me to work in a field w a lot of guys. sighhh, idk anymore. i have a feeling in the long run of wrking there, hes going to cheat on me.