Mobile Phone Porn

I understand the point in most of
Modern-day inventions
I might not know just how they work
But I do get their intentions

One thing I'll never understand
From now till I rest my bones;
What the bloody hell's the point
In porn for mobile phones?

What's the point in an iPhone with
An excerpt from 'Tale Of Two Titties'?
It's not like you can have a strum
On the 6:06 from Exeter City

Is it just me that doesn't see
Trainloads of monkey-spankers?
I guess at least it goes to explain
Why British Rail are wankers