It wasn't because I wanted to bond with them. It was because their father was a non-participating parent in their infancy.
My older, S, managed to break the habit quite well at about 11 months.
My younger, E, still crawls into bed with me, even after lots of discussions about why he shouldn't, the purchase of a plastic race car bed, and despite threats and bribery.
I'm over it. I just want to sleep without anyone putting their feet on my face.