So, let me get this straight. Joseph notices that Mary is pregnant. Joseph confronts Mary about it. And Mary replies: err, hmm, I know, the angel of the Lord came down and impregnated me. We’re going to have the child of God. And Joseph is like: okay, cool.
Even Biblical writers were not that dumb. They said Joseph was all, Bullshit, but I still have the feels." So he was going to quietly break their engagement.
Then an angel appeared in his dreams and said, “It’s true, bro, you can trust us.”
Not saying it’s a great story, but it’s slightly more believable.
There’s a non zero chance that marry gave him an epic blowjob.
Alternatively, slipped him some special shrooms or something.