Send the wrong emoji — or apparently any at all if you're male — and you're as good as gone.
The protocol can be daunting, especially to someone new to the game.
Online dating has jumped among adults under age 25 as well as those in their late 50s and early 60s.
The share of 18- to 24-year-olds who use online dating has roughly tripled from 10% in 2013 to 27% today.
According to a recent survey done by Date Watchers.com, most people are starting to get comfortable with online dating.