Endless Euphoria by Calvin Klein Perfume. Launched in 2014, Endless Euphoria is a new feminine fragrance from the Calvin Klein design house. This soft, refreshing women's scent opens with a lovely note of cherry blossom accompanied by mandarin orange and bergamot followed by a heart of rose and violet that dries down to bamboo as base. Spritz it on to boost your confidence and feel on top of the world before a fun night with the girls or an intimate dinner date.