The opening scene is implying sex with a guy (Tom Hanks) and a flight attendant woman, on a airplane. No nudity.
Around 10-12 minutes into the movie, a woman and a man (Tom Hanks) is at his apartment. The woman gets up and puts on her panties and a shirt. We didn't see her butt or her breast. She did a good job concealing her body.
Around 32 minutes into the movie, a man (Tom Hanks), rising from the bed, as if he's climbing the wall (bare shoulders are seen). Obviously, sex is implied. The woman gets dressed. No nudity.