Nothing wrong with that. It's a chant all football fans used to sing, particularly in the 80s. "we'll be running round Wembley with our willies hanging out. Repeat. We'll be running round Wembley, running round Wembley, running round Wembley with our willies hanging out. Singing I've got a bigger one than you. Singing I've got a bigger one than you..." etc
I don't know why it was sung or where it came from but it always used to be sung when a team went to Wembley.
It became, we'll be running round London with our willies hanging out, singing I've got a foreskin, haven't you.
Obviously arsenals way of turning the song back on us lol