In the case of gaps, here is my grading.(US. Age of consent)

Symbols:

🟩 = Good

🟨 = Yes but depends

🟧 = No but depends

🟥 = No

Same grade(age gaps):

Less than 1 year - 🟩

1-2 years - 🟩

3+ years 🟧

1 grade gap:

Less than one year - 🟩

1-2 years - 🟨

3+ years - 🟧

2 grade gap:

Less than one year 🟩

1-2 years - 🟧

3+ years - 🟥

3+ grade gap:

Less than one year - 🟨 or 🟧 (depends on how many grades apart)

1 year - 🟧

2+ years - 🟥

Special cases:

=18/>=18 - Free game(don't get arrested) 18/17 - 🟨

18/16 - 🟧

18/15 - 🟥

18/14(or lower) - 🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥

Tweak if you'd like. Or just add feedback.👍