I am willing to admit that I still play The Sims.

You'll be happy to know that with one of the latest expansion packs they introduced Reputations.

Monogamous Options:

Faithful - Sim has only had one relationship in their life, which has lasted for 12 days or more.
Eternally Faithful - Sim has only had one relationship in their life, which has lasted for 20 days or more.
Exploring their Options - Sim has had 3 or more relationships in their life, none at the same time.
Player - Sim has had 9 or more relationships in their life, none at the same time.
Don Juan (males) - Sim has 15 or more relationships in their life, none at the same time.
Man Eater (females) - Sim has 15 or more relationships in their life, none at the same time. 

Non Monogamous Options:

Naughty - Sim has 2 or more relationships at the same time and has not been caught by their partners.
Manipulator – Sim has 4 or more relationships at the same time and has not been caught by their partners.
Natasha (females) – Sim has 7 or more relationships and has not been caught by their partners.
Casanova (males) – Sim has 7 or more relationships and has not been caught by their partners.
Cheater – Sim has one or more betrayals.
Dirtbag – Sim has 4 or more betrayals.
Slimeball – Sim has 7 or more betrayals.