Da "feel good" chemical dat your
brain produces while you're interacting wif a nice lady named
Sarah. (Can also be spelled "Saratonin", too, of course, if one or more of da Miss Smileysweets who's giving you companionship has an abbreviated" spelling of her name.)
If you make a point of diligently cultivating/maintaining friendships wif all of
da sweetie-chicks in town named
Sarah and learning each of their work/school/friends/family-time schedules, you will have a better
chance of being able to spend time wif at least one of dem at various times throughout da
day (i.e., if one cutie usually has da mornings free, you can go visit her for a while after breakfast, and then head over to another gal's house/workplace to spend her lunch-hour wif her, and then amble across town to hang out wif a third blinky-eyed damsel in da afternoon if dat's when she has time off), and so your overall mood during da
day will be calmer and more stable because your
brain will be able to produce Sarahtonin on a more regular basis.