I should run with this: Mary realized at age 13 that she was really a boy at heart, so she pasted a beard together from wax and trimmed whiskers and paraded herself around the country under an assumed identity while spinning some yarn about divine origins to cover her back story. This would totally explain why the bible says nothing about Jesus from age 1 until his teens. As for proof, people are gullible and stupid today--they'd believe damn near anything if it came from a charismatic source. Afraid she might get found out during a steamy encounter? "Sorry, no-can-do, being chaste is like one of my things. How do I get my skin so silky smooth? That reminds me of this time I multiplied bread and fish, walked on water and brought some dude back from the dead! Yeah, no shit! And there'll be pie in the sky when you die! Now go help the needy, respect the poor and forgive people who wrong you!"
Why beg when you can start a cult and just instruct people to donate to the needy? Perhaps her greatest feat of all was duping some poor sucker into taking her place on the cross. I've even heard she never died at all and still walks among us today...probably part of the Sackler family. Hey, die a hero or live long enough to see yourself become the villain.