I think 'Twilight' is a good example. Bella helps Edward deal with his internal struggles and the challenges of their supernatural world. The way she supports him is quite touching.
One possible plot could be that the girl is secretly a witch. When the guy is helping her move, he accidentally breaks an old family heirloom of hers which has some sort of magic in it. As a result of this, she casts a spell on him in anger which turns him into a baby. Then the story could revolve around how he tries to communicate to her as a baby to reverse the spell, and she has to take care of him in the meantime, leading to some comical and also heart - warming moments as she realizes she may have overreacted.
She might be shocked at first. After all, seeing someone suddenly turn into a baby right in front of you is not an everyday occurrence. Then she could feel guilty, thinking it was her fault in some way, especially if it happened because of something related to her move. She'd probably start trying to figure out how to turn him back to normal.
One example could be 'The Unlikely Romance'. In this story, the fat guy's kindness and sense of humor win over the girl's heart.
One such story could be a tragic romance where they are in a dangerous situation and the guy sacrifices himself to save the girl.
There's the story of Mike and Zoe. They were neighbors. Mike loved to play the guitar and Zoe would listen to him for hours. One night, Zoe had a fight with her parents and ran to Mike's house in tears. Mike calmed her down by playing her favorite song on the guitar. It was a simple yet very touching moment that showed the depth of their friendship.
Self - defense is also common. If the guy is attacking the girl, she may have no choice but to fight back and end up killing him to protect herself. For example, in cases of domestic abuse, the girl may finally snap after years of being mistreated.
One embarrasing story could be at a school dance. A guy was trying to ask a girl to dance. He walked up to her, tripped over his own feet right in front of her, and then instead of asking her to dance, he just mumbled an apology and ran away.
Fanfiction.net is another good place. There are many dedicated Harry Potter fans who post their stories there. Browse through the Harry Potter section and look for stories with Dobby as a prominent helper to Harry. You might have to dig a bit, but there are some real gems there.
This is clearly unethical. Firstly, it shows a lack of respect for the girls' autonomy and rights over their own bodies. In a proper society, sexual relationships should be based on mutual consent and proper communication. Such a situation in the story also implies a disregard for the potential consequences like emotional distress and future difficulties for the girls. It goes against the principles of moral and responsible behavior.
Grannie can help in various ways. For example, she might help with knitting stories. She could share how she learned to knit, the different patterns she has created over the years, and how knitting has been a part of family traditions. Maybe she helped make sweaters for the family during cold winters, and those sweaters became a symbol of her love and care.