Back in the olden days when telephones and answering machines were the cutting edge of communication, waiting for someone to return a call was torture.
Hoping, praying and wondering was excruciating because you never knew for certain when they'd be home, or if they'd even receive it for that matter.
Nowadays, that feeling still persists over voicemails and texts, but given the ubiquity of mobile phones, it probably shouldn't. Consider the following:
As you can see, the folks at YikYak (an app used to communicate and gossip with peers in your area) think you should love on if it's been more than 3.5 seconds.
Probably not the worst idea, since the "my phone died" excuse is almost always B.S. Everyone says that, but no one's phone has actually died. Ever.
The good news is that this photo was posted to Reddit, which is shutting down The Fappening but was a treasure trove of quality online fun well before that.
The bad news is that you're not getting a text back, sorry.