Overseas sport ranking organizations: “‘FF16’ has sexual expressions. In addition, the words ‘f**k’ and ‘sh*t’ are used, so it is rated M (for ages 17 and up).”

within the United States and Canada
An group that opinions sport rankings, and many others.
From the ESRB official web site

According to the content material
* Excerpts from sexual expressions solely

Hold a person in mattress, straddle,
I hear sexual moans within the brothels,
“If you have time, I will show you.”
There are strains similar to “…Thank you for your hard work”,
There is an expression that the character partially exposes the chest and buttocks

Also, in-game “f**k” “sh*t”
the phrase is heard

Source