(especially of a man's hair, clothes, behaviour) like a girl

juvenile

(because) young and inexperienced

juvenile

claiming (without justification) great ability, qualities or importance

snobbish, conceited

easily shocked; extremely (often too) moral

shy and strict in behavior

(too) easily made sick; feeling sick; (too) easily disgusted or shocked

nauseated; finicky

(of written style, talk, behaviour etc) too formal and unnatural

artificial, pretentious