One session last summer I related this to T after she was trying to get me to connect with people more.
I was sat at the back of a bus going home from work; idly gazing out of the window when the bus pulled up at a stop. I noticed a lady sat on her own outside a cafe having a coffee and a cigarette. Well I caught her gaze and gave her a smile and she smiled back. As the bus pulled away I mouthed 'bye bye' and blew her a kiss!!
After I told T this; she just grinned at me and casually said "you old tart, you!!"