This is the Acratos and Euphrosyne mosaic. Acratos is a god symbolizing men who easily fall for women. She is one of the daughters of Zeus and symbolizes "things nice".

A viewer suggested: another explanation-not a scientific one. Akratos oinos is the wine without water. Euphrosyne it can also mean the happiness that drinking wine brings. I suppose this is the floor for a banqueting hall so a lot of wine should have been drunk there.