Here is the problem some of you are missing.
There are many Christians, atheists, and some Jews including some Christian-based websites spend countless time and money to discredit Islam using the relationship between A'isha, and Muhammad. You see, people of the likes of Pat Robertson have no problem getting detailed using Islamic sources about Muhammad's relationship with A'isha, yet we dont talk about Mary and Joseph.
How do we know Mary was a virgin? I mean after all, the hymen can tear just by riding a camel. Or do we define her virginity based on what she said to Gabriel? Regardless why do we choose to forget the relationship ofan older man marrying a 13 or 14 year old girl? Someone here said it was apart of Jewish custom that men married younger women.
Ok if such is true the same can be said of Arabs and Europeans. After all, in those times a woman in her 20's was considered old. If we are going to judge Muhammad why not judge Joseph? Is it because he (Muhammad) married a 9 year-old girl or he may have had sexual relations? Why not Joseph? After all one could speculate that after Jesus' birth Joseph could've had wild sex with Mary. Just because it wasn't written doesn't mean it didn't happen