1. Friends of the opposite sex He is not as unscrupulous as a same-sex friend, nor as intimate as a lover, so he must consciously keep his distance when interacting with friends of the opposite sex.
2. It is an eternal law that men and women are different, and friends of the opposite sex can't avoid customs. No matter how good the relationship is, it doesn't matter if you are alone with a friend of the opposite sex once or twice, but after being alone with a friend of the opposite sex for a long time, the atmosphere between two people will always become a bit "strange". When this strange atmosphere develops to the extreme, your relationship may not become so pure again. So consciously avoid being alone.