A romance GP or EP would be cool. *Reminiscing about "Hot Date" and "Party Accessoires"...*
Buying different presents/gifts for each other (flowers, jewelry, perfum, socks ;) ), a new wohoo spot: dressing room, new interactions and dresses for weddings, wedding anniversaries, first crushes for kids/teens, new dating locations (ice cream parlor?, cinema?), an attraction system (turn ons and turn offs), sharing interests/favorites, gypsy/matchmaker, setting friends up for a blind date, lovesickness, picnic areas... The more I think about it the more possibilities I see in it.