They're wearing thongs and pasties, though, so while the costumes don't leave a lot to the imagination, they're also not nude.
Female Nudity 26 Infidelity 14 Sex Scene 14 Erotica 12 Male Nudity 12 Family Relationships 9 Murder 9 Nudity 9 Violence 9 Female Protagonist 8 Friendship 8 Sex 8 Softcore 8 2000s 7 Adultery 7 Betrayal 7 Blood 7 Brother Sister Relationship 7 Gay 7 Husband Wife Relationship 7 One Word Title 7 Based On Novel 6 Boyfriend Girlfriend Relationship 6 Cheating Girlfriend 6 Erotic 6 Female Frontal Nudity 6 Friend 6 Love Triangle 6 Mother Son Relationship 6 Sex Talk 6 2010s 5 Bare Breasts 5 Brother Brother Relationship 5 Cheating Wife 5 Dysfunctional Family 5 Extramarital Affair 5 Father Son Relationship 5 Historical Fiction 5 Love 5 Male Protagonist 5 Menage A Trois 5 Mother Daughter Relationship 5 New York City 5 Prostitute 5 Slavery 5 Beating 4 Cult Tv 4 Drugs 4 Explicit Sex 4 Father Daughter Relationship 4 Female Full Frontal Nudity 4 Female Full Rear Nudity 4 Friendship Between Men 4 Homoeroticism 4 Homophobia 4 Interracial Relationship 4 Large Breasts 4 Lesbianism 4 Male Frontal Nudity 4 Male Full Rear Nudity 4 Male Objectification 4 Orgy 4 Sword 4 1990s 3 1st Century B.
Despite the raunchiness of the scenes, most of it was hidden by sheets or clothing.
There has been a lot of sex on the show, however, Meredith and Derek's encounter in the exam room during Seattle Grace's prom takes the cake.