One of the first unconscious signs of attraction, for me at least, is always searching out aforementioned attractive person and feeling disappointed that it's not them entering a room, tapping my shoulder, etc. Anyone else get this way? It's like getting your hopes up to see them, but on a smaller scale.
Expectations and Surprises
After fifteen minutes the bell rang. John looked up, half-expecting to see Sherlock standing there, but was a bit disappointed that it was just two university students. One had a carnation in his suit's front pocket and John remembered that there had been a guest speaker at Imperial College.
Sherlock wouldn't have gotten here so fast unless he'd been running, John thought as he prepared the young men's drinks. He doesn't have any reason to rush, anyway...
Just then, Sherlock swept in, eyes locking in on John immediately.
"Sherlock!" called John, smiling...as did one of the customers, surprisingly.
Prompt was #60: carnation
Three guesses as to who mystery customer is. (This is a bit rhetorical, as the answer is probably obvious...don't feel obliged to actually answer that.)