Yes, give us a Romance EP/GP please?
It always bothered me that children never had romantic interactions between themselves: innocent kiss, first crush, make believe etc.
For older life stages: some romantic interaction from previous games and new ones: cuddling, snuggling, groping, kissing, necking, making out on beds, same interactions while stargazing, slow dancing, holding hands at the table, tasting food, etc. Also, why did sims never had any kind of romantic interaction in pools? This is not just a problem for romantic interaction to be fair.
Romantic games: Spin the bottle, truth or dare?, Seven minutes in heaven for teens etc.
Clothing/items: Veils (long, short and medium), heart-shaped items-beds, couches/chairs, medieval clothing, wedding dresses etc.
whoohoo locations: Shower, pools.
traits: faithful, unfaithful, polygamous, chivalrous/courteous, loyal, macho etc.
miscellaneous: Lovesickness, promise ring, gifts, turn-ons/offs, courtly love, fairytail wedding, online dating, infatuation, stalking, broken heart, secret admirer, star-crossed love, love triangle, lovestruck, theater, acting career, love letter/song, matchmaker NPC, divorce, not instantly knowing that their significant other is cheating on them unless they actually see it etc.