The number of young adults who are single and have never married has continued to increase (Census 2021) , rising 16.7 million people, so we can't assume that all our friends will be in a relationship or comfortable sharing a bed with another friend. In fact, your invitations to stay might be refused if the only sleeping solution you can offer is a bed share!
Perhaps you have parents who have reached an age where they prefer to sleep in separate beds, or and the idea of coming to yours and having to share the bed with your dad is enough for them not to come at all. We wanted to change that.