In the Irish room scene, Jenny says that a 50-year sex delay is "turning her on".
There is one mention of the word "womb".
Marley chases a lady in the shower, then yanks her towel off as she screams (note: although nudity is implied, it is off-screen, never explicitly shown in this situation).
Marley is neutered (off-screen). John's boss makes the bizarre joke that "everyone loses their balls sooner or later".
There are two scenes where the married couple start having sex; one in a hotel room, but nothing is shown in either. In the latter scene, as the camera tilts up to the ceiling, rhythmically squeaking bed springs are heard.
The main character and his boss discuss his attempt to get his wife pregnant. Sexual innuendos are passed back and forth in this scene, including the part where the boss asks if he "pulled the goalie", meaning he has stopped using condoms/birth control while having sex.
Jenny calls John and says, "There's a naked woman in your bed," referring to herself (although we see she is fully clothed). His reply is, "Oh great. Well, why don't the two of you get started, and I'll be there shortly."
There is a scene where the wife, with her back to the camera, takes off her dress and jumps into the pool naked (we see her bare back and shoulders). Her husband follows suit and the two make love. Strong for a PG.
A baby's penis is briefly seen.
Marley is seen repeatedly humping people and furniture (most notably, the obedience school trainer). We are also told he humped dog on his walks. During the credits a short clip is shown during which Marley is humping a sofa and his penis is visible.
After having two babies, Jenny makes John promise that they won't have any more kids for a while. He promises. In the next scene, she is seen with another newborn baby at the hospital. When she introduces the baby to her father and brothers, one of the little boys says, "Daddy says her name is 'Whoops'!", meaning that her conception was an accident.