Between the opposite sex, there are some things that are private and should not be touched by others. If the opposite sex allows each other to touch these 4 things, then it is likely that the line has crossed the line by default, don't deny it.
1.Allow the other person to touch their phone.
In modern society, mobile phones have become one of people's most intimate companions, storing a lot of personal information and privacy. If the opposite sex allows the other person to look at their phones at will, then the relationship between them is already very close. This kind of behavior is often beyond the scope of ordinary friends, and it is likely that it is tacitly overstepping the line.
2.Allow the other person to touch their own family situation.
Family situations are a very personal topic and are usually only shared with those closest to them. If the opposite sex allows each other to talk about their family situation, then the relationship between them is already very close. This kind of behavior is often beyond the scope of ordinary friends, and it is likely that it is tacitly overstepping the line.
3.Allow the other person to touch their own emotional experiences.
Relationship experiences are a very personal topic and are usually only shared with those closest to them. If the opposite sex allows each other to talk about their emotional experiences, then the relationship between them is very close. This kind of behavior is often beyond the scope of ordinary friends, and it is likely that it is tacitly overstepping the line.
4.Allow the other person to touch their bodies.
Physical contact is the most direct way to tell if a heterosexual relationship has crossed the line. If the opposite sex allows the other to touch their bodies at will, then the relationship between them is already very close. This kind of behavior is often beyond the scope of ordinary friends, and it is likely that it is tacitly overstepping the line.
In short, if the opposite sex allows each other to touch the above 4 things, then the relationship between them is already very close. This kind of behavior is often beyond the scope of ordinary friends, and it is likely that it is tacitly overstepping the line. If you find yourself behaving like this with a friend of the opposite sex, then you should seriously think about whether your relationship goes beyond the realm of ordinary friends. If you don't acknowledge the relationship, then you should stop this behavior in time to avoid unnecessary misunderstandings and troubles.