diff --git a/pkg/controller/admin/user_actions.go b/pkg/controller/admin/user_actions.go
index 1046601..c0738de 100644
--- a/pkg/controller/admin/user_actions.go
+++ b/pkg/controller/admin/user_actions.go
@@ -3,6 +3,7 @@ package admin
 import (
 	"net/http"
 	"strconv"
+	"strings"
 
 	"code.nonshy.com/nonshy/website/pkg/config"
 	"code.nonshy.com/nonshy/website/pkg/models"
@@ -11,6 +12,44 @@ import (
 	"code.nonshy.com/nonshy/website/pkg/templates"
 )
 
+// Mark a user photo as Explicit for them.
+func MarkPhotoExplicit() http.HandlerFunc {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var (
+			photoID uint64
+			next    = r.FormValue("next")
+		)
+
+		if !strings.HasPrefix(next, "/") {
+			next = "/"
+		}
+
+		if idInt, err := strconv.Atoi(r.FormValue("photo_id")); err == nil {
+			photoID = uint64(idInt)
+		} else {
+			session.FlashError(w, r, "Invalid or missing photo_id parameter: %s", err)
+			templates.Redirect(w, next)
+			return
+		}
+
+		// Get this photo.
+		photo, err := models.GetPhoto(photoID)
+		if err != nil {
+			session.FlashError(w, r, "Didn't find photo ID in database: %s", err)
+			templates.Redirect(w, next)
+			return
+		}
+
+		photo.Explicit = true
+		if err := photo.Save(); err != nil {
+			session.FlashError(w, r, "Couldn't save photo: %s", err)
+		} else {
+			session.Flash(w, r, "Marked photo as Explicit!")
+		}
+		templates.Redirect(w, next)
+	})
+}
+
 // Admin actions against a user account.
 func UserActions() http.HandlerFunc {
 	tmpl := templates.Must("admin/user_actions.html")
diff --git a/pkg/router/router.go b/pkg/router/router.go
index 7772260..9ae9618 100644
--- a/pkg/router/router.go
+++ b/pkg/router/router.go
@@ -98,6 +98,7 @@ func New() http.Handler {
 	mux.Handle("/forum/admin", middleware.AdminRequired(config.ScopeForumAdmin, forum.Manage()))
 	mux.Handle("/forum/admin/edit", middleware.AdminRequired(config.ScopeForumAdmin, forum.AddEdit()))
 	mux.Handle("/inner-circle/remove", middleware.LoginRequired(account.RemoveCircle()))
+	mux.Handle("/admin/photo/mark-explicit", middleware.AdminRequired(config.ScopePhotoModerator, admin.MarkPhotoExplicit()))
 
 	// JSON API endpoints.
 	mux.HandleFunc("/v1/version", api.Version())
diff --git a/web/templates/photo/gallery.html b/web/templates/photo/gallery.html
index be15b1d..37cb219 100644
--- a/web/templates/photo/gallery.html
+++ b/web/templates/photo/gallery.html
@@ -479,6 +479,18 @@
 
                         {{template "card-body" .}}
 
+                        <!-- Admin actions: quick mark photo as explicit -->
+                        {{if and ($Root.CurrentUser.IsAdmin) (not .Explicit)}}
+                        <div class="mt-2">
+                            <a href="/admin/photo/mark-explicit?photo_id={{.ID}}&next={{$Root.Request.URL.Path}}"
+                                class="has-text-danger is-size-7"
+                                onclick="return confirm('Do you want to mark this photo as Explicit?')">
+                                <i class="fa fa-peace mr-1"></i>
+                                Mark photo as Explicit
+                            </a>
+                        </div>
+                        {{end}}
+
                         <!-- Like & Comments buttons -->
                         {{if not $Root.AdminView}}
                         <div class="mt-4 columns is-centered is-mobile is-gapless">
@@ -591,6 +603,18 @@
 
                                 {{template "card-body" .}}
 
+                                <!-- Admin actions: quick mark photo as explicit -->
+                                {{if and ($Root.CurrentUser.IsAdmin) (not .Explicit)}}
+                                <div class="mt-2">
+                                    <a href="/admin/photo/mark-explicit?photo_id={{.ID}}&next={{$Root.Request.URL}}"
+                                        class="has-text-danger is-size-7"
+                                        onclick="return confirm('Do you want to mark this photo as Explicit?')">
+                                        <i class="fa fa-peace mr-1"></i>
+                                        Mark photo as Explicit
+                                    </a>
+                                </div>
+                                {{end}}
+
                                 <!-- Like & Comments buttons -->
                                 {{if not $Root.AdminView}}
                                 <div class="mt-4 columns is-centered is-mobile is-gapless">