Well, I am a little taken aback that you have alluded to my sex life. But if it really matters to you we have never been bed people. We are very creative and well I will leave it at that.

Several of my friends co-sleep (well actually there is a group of us in a playgroup, about 20 families) and all of them started co-sleeping with their first child and some are on their 4th, so no problems for them either if you are concerned.
Sure one can get out of their bed to breastfeed, but if the baby is in bed with you then no need to totally wake up. Common sense there!
Why let a child cry all alone? That seems cruel. When I cry I like to be comforted. I don't understand why a child should have to work through those feelings all alone.

If my dh did not comfort me when I was crying I would be very upset with him. So how can one expect a baby to understand being left alone?
Actually it is not all about opinions in terms of how a baby physically responds to being left alone to cry versus being comforted by a parent. There have been many studies that show a baby's heart rate becomes elevated, etc.
Oh and dh is not ready for dd to leave the bed. He likes to be able to cuddle with both of us at night. He is in law enforcement and he knows what can happen to little ones. He feels every moment should be valued. He is really quite smart.