Let's have us a little science here, rather than uneducated conjecture as seems to be so prevalent on this post. You know...all of these answers are out there and are easily tangible if you read the bible and do a little bit of research that doesn't involve atheists and their pithy opinions.

Read this:
http://www.drdino.com/the-star-of-bethlehem-fact-or-fiction

Stop believing every atheist is smart, they are generally children looking for a place among the greats but sadly they have no greater accomplishment then trash talking what they do not understand. Nearly every great scientist was Christian: Newton, Maxwell, Legrange, and the list is huge (http://en.wikipedia.org/wiki/List_of_Christian_thinkers_in_science).

The reason for this is they didn't spend all of their waking hours trying to disprove and everpresent fact. There is a God, He sent is Son to reconcile us to Him by taking our Sin and NAILING it to a cross.
Yes there was a virgin birth and no that is not normal.

Yes Jesus lived and died a sinless and unmarried God/man.

No the church is not perfect and never will be, in fact if you find a perfect church don't join it...you'll only mess it up.

No being Christian isn't about living your life trying not to sin, if it were then we'd all sit and do nothing so we couldn't sin. The POINT was that we WOULD do something, that we would tell the world about Christ's sacrifice so that you all can know Him.

Going to Heaven isn't about WHAT you know, its about WHO you know.

St. Peter is NOT standing at some pearly gate, the gate keeper is Christ and no one else.

And if you like to think of Christians as stupid and ignorant fools that have to leave their brains at the door when they go to church then you are sorely mistaken. To know Christ and to understand Him is the most deeply involving mental task you will ever try to undertake, and without Christ's salvation and the holy spirit living inside you one can NOT understand.

I don't judge you, I simply point out the fact that you can't stop judging others because of your own fear that everything I am typing is true and you know it.