Not sure I would class those things as expression of love. Example, an old man on bus starts talking about the old days to a twenty year old women. After an hour it's his stop, as he get up she declares, "Be careful you don't want to trip" ... that is not love. Care, compassion but not love.
In order to establish control before beginning instruction, students need a way to stop what they are doing so they can listen out for instruction. I envision myself using different strategies, such as having students stop and put their hands on their head, clapping patterns with my hands, and counting down from five to establish control of the class before I begin instruction. This will manage the classroom by making instructions clear and saving time by not having to repeat directions.