The Sims 2/Romantic Interactions

The Sims 2 has several social interactions that can be classified as romantic. For clarity, a romantic interaction is an interaction that.
 * 1) Can create love or a crush.
 * 2) Can't be performed by family members.
 * 3) Can only performed between certain age groups. Teens can only do it with other teens and adults and elders can only perfrom them between themselves.

The following is a catalogue of all romantic interactions in The Sims 2. Sim A is the initiator and Sim B is the reciprient.

Backrub
Availabilty: To be accepted mood must be above 0 and one of these conditions must be met. Playful sims may do this autonomously. Outcomes:
 * Daily above 40 and lifetime above 15
 * Either daily >45 or
 * Lifetime >25
 * Accepted.
 * Sim As daily rises by 4
 * Sim As liftime rises by 2
 * Sim Bs daily rises by 6
 * Sim Bs lifetime rises by 3
 * Rejected
 * Sim As daily decreases by 7
 * Sim As lifetime decreases by 2
 * Sim Bs daily decreases by 10
 * Sim Bs lifetime decreases by 3

Caress
Availability: Playful sims can do this autonomously. Acceptance is based on these rules. The values in the table are for Sim B. Outcomes:
 * Daily above 65 and lifetime above 40.
 * Accepted
 * Creates love and/or crush.
 * Sim As daily rises by 10
 * Sim As lifetime rises by 2
 * Sim Bs daily rises by 11
 * Sim Bs lifetime rises by 2
 * Rejected
 * Both sims daily decrease by 10
 * Sim As lifetime decreases by 3
 * Sim Bs lifetime decreases by 2