There are several reasons why people choose to buy flowers for someone:

1. Expressing Love and Affection: One of the most common reasons to buy flowers is to express love and affection. Roses, in particular, are strongly associated with romantic love, making them a popular choice for couples on special occasions like anniversaries or Valentine's Day.

2. Celebrating Milestones: Flowers are often used to celebrate important milestones in a person's life, such as birthdays, graduations, and promotions. They add a sense of festivity and joy to these occasions.

3. Apologizing and Seeking Forgiveness: Flowers can serve as a heartfelt apology when you've made a mistake or hurt someone's feelings. They are a way to express remorse and show that you care about mending the relationship.

4. Offering Sympathy and Comfort: Flowers are a traditional way to offer condolences and comfort to someone who is grieving the loss of a loved one. Sympathy flowers can provide solace during difficult times.

5. Expressing Gratitude: Giving flowers is a way to express gratitude and appreciation to someone who has done something kind or helpful for you. It's a thoughtful gesture that acknowledges their efforts.

6. Cheering Someone Up: When someone is feeling down or going through a tough time, receiving a bouquet of flowers can instantly brighten their day and lift their spirits.

7. Celebrating Achievements: Flowers can be a way to celebrate personal achievements or accomplishments, such as completing a marathon, passing an exam, or achieving a personal goal.

8. Spreading Joy and Happiness: Sometimes, people buy flowers simply to spread joy and happiness. They might surprise a friend or loved one with flowers just to make them smile.

9. Enhancing Home Decor: Flowers can be used to decorate and brighten up a living space. Many people buy flowers to add a touch of nature and beauty to their homes.

10. Sending Well Wishes: Flowers are a way to send well wishes and get-well soon messages to someone who is unwell or recovering from an illness.

11. Expressing Admiration: Giving flowers can convey admiration and respect for someone you look up to or admire. It's a way to show your esteem for their qualities or achievements.

In summary, buying flowers for a person serves various purposes, including expressing emotions, celebrating special moments, offering support, and simply brightening someone's day. Flowers have a universal appeal and can convey sentiments that words alone may not fully capture, making them a cherished gift in many cultures and contexts.