iPhone Sex is basically porn played directly on your iPhone via many web site i.e OneTapPorn. The web site One Tap Porn plays Porn videos in a YouTube fashion, allowing iPhone and iPod touch users to enjoy porn with out the need to download content and with the no porn allowed on the app store this is the ONLY way to get porn.
The best example for iPhone Sex is the the youtube of porn OneTapPorn.
What happens when two people with iPhones get together and practically have sex over how great their phones are.
Hey CJ, quit having iPhone sex with Matt and play poker!