The amazing part of this story is that they told a bouncer, and it was the bouncer who called the police. Bouncers must have changed a lot since my day! Maybe they are particularly hot on this sort of behaviour in Glasgow...
The chain of events - bouncer thought to call the police, police took it seriously, there was decision to prosecute, he was found guilty... It's brilliant! And so unusual that I can barely believe it.
I also love the way that he said it's disgusting racism that he's been convicted, then admits doing it 
Is it normal for men to do this? No. Is it normal within some groups of men? Yes. Is it sexual assault, yes, should it be prosecuted, yes. This is my absolute pet hate, the fact that young women have to put up with this sort of thing with (usually) no redress, and this story is so heartening.