英语短文纠错,看一下有没有什么表达不地道或语法错误,帮我改一下,理由要详细有

英语短文纠错,看一下有没有什么表达不地道或语法错误,帮我改一下,理由要详细有
The most important body part
May I ask you a question?What is the most important body part in your mind?
Maybe you will say heart or something else,but the correct answer is shoulder.
A wide shoulder which your friends or relatives can cry on .when they are sad or disappointed,you will give the shoulder that they need…
David’s mother,a kind housewife,one day,she asked her son what the most important body part was in his mind.Her son said heart at once,she smiled and said nothing.
Over the years,she asked her son a couple more times,however,each time she said the same answer,“you are wrong,but you are getting smarter.”
When David’s grandpa died,the entire family member cried,also,tears welled in the eyes of David’s mother.Suddenly she asked her son the special question,David was shocked,and confused.He didn’t know why his mother asked this question again and again.He summoned the courage to ask her mother and knew the answer…
The most important part was shoulder,everyone needs[这里是用needed呢,还是用needs呢] a shoulder to cry sometimes,his mother hoped her son would have enough love and shoulders when he needed…
The most important body part is not a selfish one,it is sympathetic to the pain of others…
请大家把错误的理由写出来下，因为我水平不是很好呀谢谢了