Last night, while aboard a commuter-packed Northern Line train travelling slowly and tediously toward Clapham South, I felt something brush up against my crotch. I ignored it to start with, assuming that it was someone's bag or something. Besides, who am I to pass up the opportunity of receiving an accidental crotch rubbing?

But then it happened again. I looked down the pole that some large breasted woman in a really horrible green Principles (probably) suit was pressing me up against. First I saw my hand holding onto the pole and then, underneath, another hand also gripping the pole, but with the index finger outstretched and gently, yet purposefully, brushing ... erm ... little Christopher, through my jeans. I looked up to discover that my assailant was a ratty-looking, late thirty-something male with an unattractive nose piercing, purposely and intently staring in the opposite direction.

I was literally shocked into silence. There was absolutely no-way that he didn't know what he was doing, so I moved my mid-section away as far as I could until we reached the next station at which point I used the opportunity to move away from the perv and stand at the other end of the carriage.

When I surfaced from the Underground at Clapham South I immediately texted my nearest and dearest to tell them that I had just been sexually abused.

Helen was the first to text back. "Violated or aroused? I take it he wasn't cute."

And therein lies the sad truth. I don't know if this is a gay "thing", a human "thing" or a Christopher "thing", but the fact remains that had he looked like this then it is not out of the question that I may have encouraged the behaviour and even, perhaps, returned the favour. But the fact that he didn't means that I felt shocked, appalled and violated.

But then I thought, am I allowed to have it both ways?