I personally dont think I could. I wouldnt be able to help but bond with the baby & therefore I would find it difficult not getting to keep it at the end IYKWIM.

One of my friends that I went to school with but still associate with was a surrogate for her older sister. She gave birth to her niece last Dec. My friend said that she's been fine, she doesnt feel like it's her baby at all, just her niece. She see's her every now & then but no different than anyone else with a niece or nephew. She has 2 young girls of her own (7yrs & 9yrs) & divorced so she feel finished with her baby making days (for herself). So far it's been great, hope it stays this "easy" for them as time goes by.