The series of bodily changes that occur in the female of most mammals from one period of estrus to another. The estrous cycle usually takes place during a specific period known as the breeding season, which ensures that the young are born at a time when the chance of survival is greatest.
ear-to-ear. It's about smiling. Ear-to-ear smile or grin is when you have a very broad and generous smile. Such a smile when each corner of your mouth is by each of your ears. Explain to me why you don't have an ear-to-ear grin right now.
When your sweet lilting laughter's Like some fairy song, And your eyes twinkle bright as can be; You should laugh all the while And all other times smile, And now, smile a smile for me. When Irish eyes are smiling, Sure, 'tis like the morn in Spring. In the lilt of Irish laughter You can hear the angels sing. When Irish hearts are happy, All the world seems bright and gay. And when Irish eyes are smiling, Sure, they steal your heart away. For your smile is a part Of the love in your heart, And it makes even sunshine more bright.