The phrase "make someone's toes curl" is often used to describe a feeling of intense pleasure or excitement. There are several synonyms one can use to express this sensation, such as "send shivers down one's spine," "give goosebumps," "set hearts racing," "make one's hair stand on end," and "ignite an electric feeling." Other words that convey similar emotions include "thrill," "excite," "enchant," "mesmerize," and "captivate." Overall, these synonyms can be used to describe a wide range of experiences that evoke powerful emotions, from a spine-tingling romantic encounter to an adrenaline-pumping adventure.