Is it normal for a teenage girl NEVER to use profanity?

My son's girlfriend never swears. she is also anti-smoking/drug. And she still hugs her exes to "make them feel better" Is this normal? She also likes to wear her bikini around her house and has her hair really long and is obsessed with her physical external beauty. Usually this type of girl swears and gets angry but my son's girlfriend does not. Do you think that is creepy???