How can a baby be born of a virgin?

You will have to have sex if you want a baby. How can Christ be born to Mary if Mary didn't have sex with a guy. Please don't say that the holy spirit impregnated her. This is not possible and there is no evidence for it. It is possible that some guy would have given a sleeping drug or made her get drunk and then fornicated with her when she was subconscious or asleep. This is possible. People must have misunderstood that he was born of a virgin as Mary didn't know that she lost her virginity. The virgin birth is also mentioned in some of the gospels. There is also no evidence for the life of Jesus. The only texts that describe Jesus are gospels. Gospels are not history. Gospel writers never met Jesus and had a conversation with him. There are no roman historical records of Jesus Christ. No historical evidence for resurrection either. All of the Bible was written at the council of nicea organized by Emperor Constantine. There is also no record in the Bible what he was doing during his teenage. I think he was probably an awkward teenager and that is why they did not include any of it.