Here is how the films that David has appeared have been rated in the US and reason for the rating:
Jude - Rated R for strong sexuality and intense depictions of death and birth
LA Without A Map - never released in the US - the region 1 DVD is not rated
The Last September - Rated R for some violence and sexuality
Being Considered - never released in US - it had a 15 rating in the UK
Bright Young Things - Rated R for some drug use
Harry Potter and The Goblet of Fire - Rated PG-13 for sequences of fantasy violence and frightening images
Free Jimmy - never released in the US
Glorious 39 - Rated R for some violent images and brief sexuality/nudity
St. Trinian's 2: The Legend of Fritton's Gold - never released in the US - rated 12 in the UK
How to Train Your Dragon - Rated PG for sequences of intense action and some scary images, and brief mild language
United - PG-13 for some disturbing images, smoking and brief strong language
The Decoy Bride - Rated PG for some rude content
Fright Night - Rated R for bloody horror violence, language and some sexual references
The Pirates! Band of Misfits - Rated PG for mild action, rude humor and some language.
In case you are not familiar with the MPAA (motion picture association of America) rating system, this is what it means.
PG — Parental Guidance Suggested. Some Material May Not Be Suitable For Children.
A PG-rated motion picture should be investigated by parents before they
let their younger children attend. The PG rating indicates, in the view
of the Rating Board, that parents may consider some material unsuitable
for their children, and parents should make that decision. The more
mature themes in some PG-rated motion pictures may call for parental
guidance. There may be some profanity and some depictions of violence or
brief nudity. But these elements are not deemed so intense as to
require that parents be strongly cautioned beyond the suggestion of
parental guidance. There is no drug use content in a PG-rated motion
picture.
PG-13 — Parents Strongly Cautioned. Some Material May Be Inappropriate For Children Under 13. A
PG-13 rating is a sterner warning by the Rating Board to parents to
determine whether their children under age 13 should view the motion
picture, as some material might not be suited for them. A PG-13 motion
picture may go beyond the PG rating in theme, violence, nudity,
sensuality, language, adult activities or other elements, but does not
reach the restricted R category. The theme of the motion picture by
itself will not result in a rating greater than PG-13, although
depictions of activities related to a mature theme may result in a
restricted rating for the motion picture. Any drug use will initially
require at least a PG-13 rating. More than brief nudity will require at
least a PG-13 rating, but such nudity in a PG-13 rated motion picture
generally will not be sexually oriented. There may be depictions of
violence in a PG-13 movie, but generally not both realistic and extreme
or persistent violence. A motion picture’s single use of one of the
harsher sexually-derived words, though only as an expletive, initially
requires at least a PG-13 rating. More than one such expletive requires
an R rating, as must even one of those words used in a sexual
context. The Rating Board nevertheless may rate such a motion picture
PG-13 if, based on a special vote by a two-thirds majority, the Raters
feel that most American parents would believe that a PG-13 rating is
appropriate because of the context or manner in which the words are used
or because the use of those words in the motion picture is
inconspicuous.
R — Restricted. Children Under 17 Require Accompanying Parent or Adult Guardian.
An R-rated motion picture, in the view of the Rating Board, contains
some adult material. An R-rated motion picture may include adult themes,
adult activity, hard language, intense or persistent violence,
sexually-oriented nudity, drug abuse or other elements, so that parents
are counseled to take this rating very seriously. Children under 17 are
not allowed to attend R-rated motion pictures unaccompanied by a parent
or adult guardian. Parents are strongly urged to find out more about
R-rated motion pictures in determining their suitability for their
children. Generally, it is not appropriate for parents to bring their
young children with them to R-rated motion pictures.