Oh boy… ok I can see that people don’t believe in soul ties but let’s try to find a Biblical explanation and not what we as humans believe because our deeds without God are like filthy rags (Isa 64:6 But we are all as an unclean thing, and all our righteousnesses are as filthy rags; and we all do fade as a leaf; and our iniquities, like the wind, have taken us away. )
When God created man and women he told them that they will become one (echad)
Gen2:24 Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh
Eph5:31For this cause shall a man leave his father and mother, and shall be joined unto his wife, and they two shall be one flesh.
This is a soul tie between husband and wife and is unbreakable by man Mark10: 7-9 For this cause shall a man leave his father and mother, and cleave to his wife; And they twain shall be one flesh: so then they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
But the challenge for us as is that we don’t have all the answers because Yeshua told the Pharisees the following in Luke 20:33-35 Therefore in the resurrection whose wife of them is she? for seven had her to wife. And Jesus answering said unto them, The children of this world marry, and are given in marriage: But they which shall be accounted worthy to obtain that world, and the resurrection from the dead, neither marry, nor are given in marriage.
They clearly also didn't understand everything...
By reading the Bible we can see that when we have sex with somebody there is this bond that is created and we become one. That is what is referred to as soul ties by the world today. If we sleep around that soul ties are inter mingled and in the end you have all of these unknown forces working in on your relationships. That is why we should try to abstain from the sexual pleasures until we are married to a person. To put it bluntly, if you act like a cheap girl or boy you might have problems in future relationships you are not even aware of.
I have seen it so many times before with friends of mine, they go into a relationship that is clearly not working for either party but because there is this soul tie (sexual bond) they cannot walk away from the poison being created in this physical relationship.