It was the club socks of the Barbarians treasurer or something, apparently its now a tradition that one player wears these socks. Some shitty English pub team or something.
How do we know? Let's test that theory at the SFS.
Warning - There may be some who are offended by female nudity so they had better not look.
That's a bit slack for nobody to Utube that yet and it's a pity because it's authentic boner material even for the over-70s - though I will have to check with Bruce for confirmation. Maybe it's just me.