Image imported from derpibooru 
Original Description:
 
When Sandbar met Yona, he saw more than just a pretty face. He saw someone who felt down to earth much like him. Other stallions loved looking at Rarity and other mares of high fashion. Others wished they could have an alicorn like Twilight or Cadance. Many stallions also adored mares such as Fluttershy. But Sandbar found he wanted a girl who looked very big and sturdy. He didn’t want one who looked delicate, even if those looks were deceiving. He wanted one who was as big and strong as she looked – and with the joy of friendship to match.
 
Sandbar couldn’t quite explain it. Maybe he wanted a woman who felt like a mother? Or big sister? One he felt comfortable being vulnerable with? A relationship where he didn’t feel he had to be the strong one?
 
When Yona met Sandbar, she saw a cute little pony. There were a few bullies she was tempted to smash. But she didn’t want to lose access to her friends, so she held back. Sandbar was one pony she could never crush – he was just too precious to her. He also taught her that she did not need to avenge her honor.
 
Why would Yona want a man who’s small and fragile compared with her? Maybe it’s because it brings out the mother, or big sister, in her? She loves to be the big one, but she also loves having a special creature worth protecting – one who makes her feel free to be vulnerable with her emotions.
 
Even when they make love, Sandbar doesn’t feel as strong as his wife. However, this isn’t a big deal – since Yona loves to touch herself when she thinks of Sandbar. (I just referred to three dirty songs – but I recast the words to celebrate what I value in marriage as a Christian!)
 

 
Art by NobleBrony317. Dialogue added by me.