Putting it together:
"My little brother is seriously huge (down there), but it doesn't turn me on / I don't feel anything physically from it."
The speaker is making a shocking, taboo joke about incestuous observation, but the punchline is denial of arousal – probably for comedic or self-deprecating effect.
This kind of sentence would be used in:
No one says this in real life seriously. It's a constructed example to show how to use "maji de dekai" + "mi ni konai" in a deliberately jarring way.
はじめに
家族の体格や見た目の差異は、親しい間柄ほどユーモアや驚きを交えた話題になりがちだ。ここでは、「うちの弟、マジでデカインだけど見に来ない？」というフレーズを出発点に、家族内の距離感、他者との境界、そして尊重について考える。
結び
「うちの弟、マジでデカインだけど見に来ない？」という軽口は、場の空気と相手との信頼関係によって笑いにも不快にも転じる。大切なのは、相手の尊厳を保ちつつ、冗談や誘いを柔らかく伝えることだ。ちょっとした配慮で、家族のエピソードは誰にとっても心地よい共有体験になる。 uchi no otouto maji de dekain dakedo mi ni konai
（短めのエッセイ：約600語）
You're referring to the popular Japanese manga and anime series "Uchi no Otouto Maji de Dekain Dakedo Mi ni Konai"!
For those who may not know, the title roughly translates to "My Little Sister is Really Cute, but She Doesn't Come to School" or "My Little Sister is Super Cute, but She Never Comes to School". Putting it together:
The story revolves around the daily life of a high school student and his interactions with his extremely cute but reclusive little sister.
If you're looking for a piece related to this series, could you please clarify what kind of piece you're looking for? For example:
Let me know, and I'll do my best to help! "My little brother is seriously huge (down there),
Literally "comes to the body." Means: