How does the "first man, Adam" (1Cr 15:45) fit into your theology? Does your Bible say the first "flesh" formed man? Mormons believe in spirit only men, do you agree with their theology in that regard? Moroni (Morman Prophet) became an Angel; do men too? Do Angels (spirit beings) die? Was Adam an Angel before his "incarnation"?
Always use the straightforward passages when considering the cryptic passages. If the straightforward passages contradict our understanding of a cloudy passage, stick with what you can ascertain, rather than squeezing meaning into words that are not very clear.
Mar 10:6 But from the beginning of the creation God made them male and female.
Mar 12:25 For when they shall rise from the dead, they neither marry, nor are given in marriage; but are as the angels which are in heaven.
Pre-Fall establishment of marriage:
Gen 2:24-25
24 Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
25 And they were both naked, the man and his wife, and were not ashamed.
When were the souls created????