For a simple relationship test:
Let's say your character has a social score of 30.
This means you feel Maternal 30% of the time and Paternal 70% of the time, more likely to take the lead in relationships.
You are on a date with a female foxy business woman who themselves has a social score of 20, making them Paternal 80% and Maternal 20%. They used to being the one in charge.
For there to be a relationship success, one person must roll Paternal, one Maternal. It doesn't matter who.
In this example,
There's is a 14% chance of you being Paternal and them Maternal, and 24% chance of you being Maternal and them Paternal.
Total of a 38% chance of this date having a success outcome.
There will be other factors, like the npc personal preferences that may boost success rates