1. He Married Aisha when she was 9 years old to attract children and show to treat children, and children like to play with Aisha (God bliss her), and she will teach children what our prphit Muhammed says, and she was so you young to memorize the maximum from what our prophit Muhammed says (Hadith).
2. He married his daughter in law after divorcing from Zied, and Zied was adopted, and adoption is prohobitted in Islam.
3. He married 9 wives and one reason for this is that his wives can teach the maximum of Muslim women about Islam, and things that are of women interst such as the period and other things.
About Jesus here is a 6 minute video.
http://www.youtube.com/watch?v=iNf7ewKOvfA