Apollo 13 (1995)

There is some kissing and references

An unmarried astronaut is showering with a woman. The phone rings and she asks him to let it ring. They are then both seen only covered by towels.

An astronaut and his wife are relaxing on lounge chairs. He climbs into her chair and nuzzles her clothed breasts while she playfully resists and then snuggles with him.

A reference to an STD; one astronaut speculates that another, whom the movie presents as promiscuous, gave him the clap by using his relief tube.