Cyclists colliding with other traffic

On the subject of cyclists I was a little disconcerted by a couple of lycra men I had the misfortune of following for a few minutes on Sunday.
It wasn’t that they were two abreast on a B road, on a scorching day, whilst I was trying to get to the pub.
One of them had a beige coloured panel on his Morph suit, right on his posterior and due to , I assume, a sweaty crack it was see through. It looked like a bare arse and the two minutes I was behind them for seemed like two hours - I was waiting for my 6 yr old daughter to pipe up with a comment but luckily she was watching Trolls in the back.
Honestly, what a colour to choose for an arse panel - is this some type of ■■■■■■■■■■ signal?