the nice thing about mastodon compared to birdsite that i never see anyone talk about: you can probably actually browse it in public, even if you follow people who post lewd stuff sometimes
because birdsite's approach to nsfw is just "here let us decide for you based on a shitty algorithm, or you can decide if your entire account is Sensitive (no per-post) and also if you want to view Everything Sensitive Ever"
mastodon is just "you know what you're doing, tag your stuff."