It's no secret that lots of people watch pornography on the internet. It's usually something done behind closed doors - but how would you feel about someone watching porn in public? The BBC's Siobhann Tighe describes a troubling experience on a London bus.
It had been a long day at work. I got on the bus at 7.30 in the evening and it was cold and drizzly. All the passengers were wrapped up in thick coats, hoods and hats.
Inside, the bus was softly lit and I was expecting to zone out on my way back home: just let the day go and switch off.
I sat on the lower deck beside a complete stranger and didn't give it a second thought. I was just relieved to get a seat. As we meandered through the London traffic, my gaze was drawn to my neighbour's phone. I wasn't being nosy but in the dim light of the bus, the brightness of his mobile caught my attention even though he was slanting it slightly away from me.
Although I didn't mean to or want to, I found myself looking over towards his mobile a few times and then it suddenly occurred to me what was going on. The man beside me was watching porn.
Once I realised, although I genuinely didn't mean to, my eyes kept on being pulled back to it. I couldn't quite believe it. First he was watching animated porn, with the two naked characters in lurid colours repeating their movements over and over again. Then he started watching a film, which seemed to begin in a petrol station with a large woman in a low-cut yellow top and blonde hair peering into the driver's window.
I didn't hear any sound, apart from a brief few seconds when my fellow passenger pulled the headphone jack out of his mobile, and then reinserted it.
The man didn't seem to notice my glances towards his phone, maybe because his hood was hampering his peripheral vision. He seemed oblivious to me and others around him, who admittedly wouldn't have been able to see what I saw.
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Is it OK to watch porn in public? - BBC News