Abid wrote:So if the prophet was fabricated by those with an ulterior motive i.e to create a religion out of thn air?
Why would they include certain things that could cause doubt such as the marriage to Aisha???

Because it was perfectly acceptable in that area at that time so was not considered unusual.
Now how about you tell me why you think the following is of divine origin rather than the utterings of a loony.
Bukhari Volume 2, Book 21, Number 245:
Narrated 'Abdullah :
A person was mentioned before the Prophet (p.b.u.h) and he was told that he had kept on sleeping till morning and had not got up for the prayer. The Prophet said, "Satan urinated in is ears."
Bukhari Volume 4, Book 54, Number 492:
Narrated 'Abdullah:
It was mentioned before the Prophet that there was a man who slept the night till morning (after sunrise). The Prophet said, "He is a man in whose ears (or ear) Satan had urinated."
Perhaps that does not sound strange to one who also believes that satan spends the night in your nose. After all he is close by and what do we all do first thing upon waking in the morning?
Bukhari:Volume 4 Book 54 Number 516
"The Prophet said, ?'If anyone rouses from sleep and performs ablution, he should wash his nose by putting water in it and then blow it out thrice because Satan has stayed in the upper part of his nose all the night.'"