This is one of my favourite types of WAM video.

Seeing a girl who knows she looks hot in a bikini being humiliated by having her bikini bottoms being filled with slop.

The look of embarrassment and shock as she feels the slop being poured onto her prime real estate and the sexy bikini bottoms beginning to bulge.

I suppose it is the idea of a sexy female being degraded and being brought down to size. In that the 'I am sexy and I know I am' attitude of the girl is tempered.