People have pretty strong motivation to conflate the two - namely, access to privileges traditionally granted to parents. Leaving work early to deal with kid(/

People have pretty strong motivation to conflate the two - namely, access to privileges traditionally granted to parents. Leaving work early to deal with kid(/dog) stuff, public spaces tolerating the presence of your loud, annoying, not-that-clean kid(/dog), an expectation of urban spaces providing places for your kid(/dog) to go to the bathroom. Etc.