TKL Blog posting to Facebook

I need help from an expert in Facebook. In my blog, I add a "Like" feature. A user who click on the the "Like" button will have an automatic posting into his or her Facebook with the information shown on here. At present, the posting shows the message from my blog introduction, i.e. "I retired from NTUC Income .....". How do I change this posting to show the actual content of the blog, rather than the introduction? Send your answer to kinlian@gmail.com or post here in this comment..