Closely related to phone sex. However, instead of the intimate couple communicating via phone, they are talking via morse code.
*Click, click, beep, click, bleep, click, click, clack*

Girl: "OH YESSS!"

*Click, clack, clunk, clack, beep, beep, clack, click*

Boy: "OMG, this Morse Code Sex is AMAZING!"
by The guy on superman's PJs April 30, 2010
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