I do restrict my 75 lb Aussie mix around little kids. In his joy at seeing them, he can knock them over. And his desire to lick their faces CAN be annoying...
Djinni *adores* that little boy, possibly because he always lets her lick the breakfast remnants off his face but I never let him in to play with her.
She can run 35 mph *easy* and her exuberance at seeing him made me concerned she'd accidentally flatten him on one of her over-joyed fly-bys.
[just as she's flattened me, several times]
I doubt she weighs even 50 pounds but her speed alone makes her a dangerous, furry missile of love.
Their affair continues apace *though the fence*....:)
[sorry it's not as "mawkish" as your photo...I tried]...;D