God created humanity in His own image (Genesis 1:27) and in Genesis 3 Adam and Eve rebel against God thereby corroding the perfect nature of the world, bringing about death, sin, disease, famine, and other such issues. One of the struggles humans have is that of not following God's commandment to keep chaste until marriage.
In today's society, even people who call themselves "Christians" say that kissing is "just kissing" and they think nothing of premarital kissing. God is not with these people who will even call themselves "conservative evangelical Christians" and may belong to such liberal groups as the Southern Baptist or United Methodist groups or the Satanic Catholic Church. Some of these same churches are the same churches that allow vile secular music from such despicable as rappers like Eminem, seductresses like Taylor Swift, and other arbiters of immorality, and also allow violent video games such as Halo.
The Whore of Babylon, more politely known as the Roman Catholic Church, is ultimately for premarital kissing although to be fair to Rome it still has managed to be less vile than the evil seductress Swift.
Matthew 5:28 says not to lust after a woman or else it is adultery, and Leviticus 20:10 says that the penalty for adultery is death. It is important to know that hugging, kissing, and hand holding are considered sexual acts, and thus are prohibited by God until marriage and even within marriage are only to be done sparingly behind closed doors.