After we adopted Benjamin and Flopsy, I had to keep them separate at first until they were bonded. Benjamin is the only bunny we've had who could escape from the x-pen! He was Spider-Bun in his young days!
Of all the rabbits I've had so far, Flopsy and Benjamin were the easiest to bond. They pretty much didn't fight at all, and Benjamin wanted to groom Flopsy almost immediately! I think it was love at first sight for him, he always doted on her and they were always sitting together.