The question you've asked is rooted in religious beliefs and theological interpretations, and there are different perspectives on this matter among various religious traditions. Here's a general explanation based on some religious viewpoints:
In many monotheistic religious traditions, such as Christianity, Judaism, and Islam, God is often perceived as being beyond human attributes and limitations. As such, concepts like marriage and family are typically seen as human experiences that don't apply to God in the same way they do to human beings.
God's nature: In monotheistic faiths, God is often considered to be a spiritual, eternal, and transcendent being. The idea of God having a wife or family would imply that God is limited by human characteristics and experiences, which goes against the concept of God's omnipotence and divine nature.
Jesus Christ: According to Christian theology, Jesus Christ is considered both fully divine and fully human. His purpose in coming to Earth was to save humanity from sin through his sacrifice and teachings. Some theological interpretations suggest that Jesus' decision not to marry was a part of his divine mission, as it allowed him to fully devote himself to his purpose and ministry.
"Go and multiply": The command to "go and multiply" comes from the Bible (Genesis 1:28), where God instructs Adam and Eve to be fruitful and multiply and fill the earth. This directive is understood as an encouragement for humans to procreate and populate the Earth. It's important to note that this command is specific to humanity, as it relates to the continuation of the human race.
Religious beliefs and interpretations vary widely, and different faiths may have varying understandings of God's nature and purposes. The absence of a spouse or family for God and Jesus Christ is consistent with the traditional monotheistic view of their divine and eternal nature.
Ultimately, discussions about God and religious doctrines often involve matters of faith and personal beliefs, and interpretations may vary among individuals and religious communities. It's essential to approach these topics with respect and understanding of diverse viewpoints.