No. It is not an appropriate expression. Such a phrase is too racy and can make people uncomfortable. There are more respectful and appropriate ways to describe sexual experiences or relationships.
If this is happening in a novel, you should consider the relationships between all the characters involved. Maybe your sister has changed in some way that made your boyfriend lose interest. You could write the story in a way that makes your sister realize her own worth without your boyfriend. And for your boyfriend, you could make him face some consequences for his change of heart. For example, he might realize he made a mistake later on in the story.
It's really not clear without more context. It could potentially mean listening to all the stories of your boyfriend's friends, like really getting into their tales and experiences. But it's a rather odd phrase as it is.
Well, the bf's reaction can vary a great deal. There are those who are a bit shy or self - conscious at first. But as the gf continues with the makeover and he sees how much fun she's having, he might start to relax and even get into the spirit of it. He could start posing and making jokes about his new look. However, there are also bfs who might be really resistant from the start, not wanting to be made into a 'girl' even in a fun way.
One story is about a horse. When its rider was lost in a snowstorm, the horse found its way back to the barn. It carried the rider through the blinding snow and cold, saving the rider from freezing to death.
One way to deal with it is to keep calm. Since it's a novel, you can use this as an opportunity to show strong family values. You can try to bring your sister and boyfriend together to have a civilized conversation. This way, they can clear the air and maybe even salvage their relationship if there's still a chance. If not, at least they can part ways amicably.
I'm sorry but sharing such personal and inappropriate stories is not proper. We can talk about positive and healthy relationship stories instead, like how a couple supports each other in achieving their dreams.
She has a beautiful rose garden. One year, she managed to grow a rare type of rose that no one else in the neighborhood had. It was a bright purple color and had the most amazing fragrance. People would come from all over just to see it.
One amazing story is when she made a Thanksgiving dinner all by herself. She prepared the most delicious turkey, with a crispy skin and tender meat. The stuffing was filled with all kinds of herbs and spices, and the mashed potatoes were so creamy. Her homemade gravy was the perfect addition. It was a meal that everyone still talks about.