diff --git a/django/http/parsers.py b/django/http/parsers.py
index 0fb2271fa2..236cd318ab 100644
--- a/django/http/parsers.py
+++ b/django/http/parsers.py
@@ -16,16 +16,11 @@ class BaseParser:
     def parse(self, data, request=None):
         pass
 
-    @property
-    def _supports_form_parsing(self):
-        form_media = ("application/x-www-form-urlencoded", "multipart/form-data")
-        return self.media_type in form_media
-
 
 class FormParser(BaseParser):
     media_type = "application/x-www-form-urlencoded"
 
-    def parse(self, data, request=None):
+    def parse(self, request):
         from django.http import QueryDict
 
         # According to RFC 1866, the "application/x-www-form-urlencoded"
@@ -42,7 +37,7 @@ class FormParser(BaseParser):
 class MultiPartParser(BaseParser):
     media_type = "multipart/form-data"
 
-    def parse(self, data, request=None):
+    def parse(self, request):
         if hasattr(request, "_body"):
             # Use already read data
             data = BytesIO(request._body)
@@ -71,6 +66,10 @@ class MultiPartParser(BaseParser):
 class JSONParser(BaseParser):
     media_type = "application/json"
 
-    def parse(self, data, request=None):
-        # TODO enable strict mode. Like DRF.
-        return json.loads(data), MultiValueDict()
+    # TODO rename request -- it's not always one.
+    def parse(self, request):
+        from django.http import HttpRequest
+
+        if isinstance(request, HttpRequest):
+            request = request.body
+        return json.loads(request), MultiValueDict()
diff --git a/django/http/request.py b/django/http/request.py
index 069a5e046e..77f776cd9e 100644
--- a/django/http/request.py
+++ b/django/http/request.py
@@ -376,13 +376,8 @@ class HttpRequest:
         if selected_parser:
             selected_parser.parsers = parser_list
             try:
-                if selected_parser._supports_form_parsing:
-                    # TODO Not sure how to make these consistent.
-                    data, self._files = parser.parse(None, self)
-                    setattr(self, data_attr, data)
-                else:
-                    data, self._files = parser.parse(self.body, self)
-                    setattr(self, data_attr, data)
+                data, self._files = parser.parse(self)
+                setattr(self, data_attr, data)
             except Exception as e:
                 # TODO 'application/x-www-form-urlencoded' didn't do this.
                 # An error occurred while parsing POST data. Since when