Question: Rachel meets Joshua at work. She goes back home after work and as she enters home announces: "I have the best job in the entire world" and keeps on repeating Joshua's name and enjoys it when suddenly Ross gets upset about it and says "hello?" which implies that "I am sitting right here, and you shouldn't be making me jealous." She answers "hi" apologetically. My question is: what right does Ross have to get upset? they're not in a relationship.