I understand completely!
When Pip was a newborn we had her cradle in the bedroom, I co-slept for the first little while, but hubbys not exactly a small man, and he's deep sleeper who has even rolled on me a few times! (Unintentionally
)
So while I trust myself not to roll on baby, I can't say I'd say the same about DH, and the thought of rolling on Pip in his sleep terrified him.
For our next one we've decided to get a side-car crib. It seems like the safest way to co-sleep.
Peace,
-Niffer