Julian, whom we now know is a boy (that's why it's Julian, not Jillian any more) should be neutered. This will improve his long-term health, and make several behavior problems less likely later on, including spraying (peeing on things to mark his territory). Do it now, and get it over with!

A person I know was moving and thought she might have to give up her 7-year-old bunny. He was not neutered, and so the rescue organizations would not take him, as they considered him too old to risk the surgery. Thanksfully, she got to keep him, but that's just one other reason to do it now!