A scene where a group of teens play truth or dare and one of the dare is to get this guy kiss another guy "on the mouth". The lead actress, a girl about 13-15 years old, is the one who sets this dare. They do it and back off in disgust. Another scene where two teens, boy and an older girl, maybe siblings have a "who can hold their breath longer in the swimming pool" game. The characters always wear beach clothing, bikinis etc. They are all tan. Everyone is happy in this movie. Released in 2000's, I think. Set in West coast of the US. Maybe it's not even America.