Can ex's remain friends?

Hm.....I don't see how I'm asking for trouble? I am mearly asking a question regarding a discussion my friend had about the situation. We do in fact have a child together thus why we remain friends for that fact. We do not have dinner together, we do not share holiday's together, we do not hang out and watch movies or other. However, due to our parenting agreement we do have to contact one another every night to discuss our son's day and it allows him a chance to speak with the other parent. It was mearly a question, can ex's remain friends without there being a secret agenda? I am happily married but this question was risen when someone asked why my ex isn't remarried or dating anyone. So, any answers relating to the question at hand would be greatly appreciated. Thank You!

I feel that I answered your question appropriatly, even though I didn't tell you what you wanted to hear. I said that you SHOULD have a relationship for the child's sake. You ARE asking for trouble if your friendship is about anything other than that, which it very well may not be since you say your husband is understanding (unless he is very gullable or something). I'm sorry if my response offended you, that is not what I intended. I simply gave an honest respronse to the question as you posted it.