Something's Gotta Give (2003)

In writer/director Nancy Meyers' romantic comedy, a tables-turned around film:

• the scene in which 63 year-old Viagra-taking record-company mogul Harry Sanborn (Jack Nicholson) - who dated younger women as girlfriends (including young daughter Marin Barry (Amanda Peet)) - announced to her mother Erica (57 year-old Oscar-nominated Diane Keaton): "I'm dating your daughter, Marin"
• Harry's sudden entrance into a room in a Hamptons beach house when he came upon a naked and embarrassed Erica, Marin's mother - a sexy, mid-50s, divorced, successful playwright, and his half-hearted apology after partially covering his eyes: ("I'm sorry! I didn't see anything. Except maybe a few tits!")
• his ensuing interest in the more age-appropriate woman after suffering a mild heart attack
• the sex scene between Erica and Harry (three days after he suffered a heart attack), when he cut off her white "damn turtleneck" with a pair of scissors and then offered oral sex, when she became overwhelmed and exclaimed: ("I think we should take your blood pressure...I think it's irresponsible not to...120/80...Oh, my God, I do like sex!...Wow, oh, God! So this is what you're supposed to do on a rainy afternoon, huh?") - she was amazed by her own responsiveness: ("I really thought I was sort of closed up for business. I never expected this")