Can someone explain to me the reasons why you Co-Sleep?
I never intended to co-sleep and I didn't with DD1 although she slept in a cradle right next to my bed. With DD2 she had some night/day confusion and co-sleeping seemed to help regulate that. Also it made feeding after having a c/s so much easier as I didn't have to get up to her and lift her etc. So it just happened and it made all of us get a lot more sleep especially in the early days.

How long you plan on doing it for?
We have stopped - at about 10m when DD2 started crawling she became really unsettled and wouldn't sleep well in bed with us so she relocated to a shared bedroom with DD1 (much to DD1's delight)

And if u only have one bub and another one comes along are you planning on having them both share your bed?
Sometimes both girls are in bed with us and it is very squashy and noisy - fortunately this is a very rare event and only if they both are sick would they be sleeping in our bed. DP would probably be on the couch

If not and you plan on moving the older one in their own bed, isn't it cruel to just than "kick" them out?
DD2 pretty much made her own decision to move and she is fine - plus she is now in with her sister and loving it.

As far as the DP issues - my DP had no issue with it at all and found that having the more rested nights was a bonus with DD2 in our bed. Things took a long time to get back to normal intimacy-wise for us but there are other rooms in the house that we made use of or if DD2 was sound asleep DP could move her into the cradle for a little while for us to have some intimate time.