What do you think about you or your husband having close friends of the opposite sex?

For me, it's okay because I know some of his close girl friends are his co-workers (except this one girl I can't forget who we used to hang out with but tried to ruin us and build a gap between our marriage). Anyway, I still allow him to have new friends, to visit us at home and during occasions. I just don't know his side about this, because I have a very few friends and most of them are from my college pa, and if ever I will have a new guy friend, it would be from his friends too. Maybe I will never have my own set of friends for now because I am a stay-at-home mom.