This game features deep-throating.
Deep-throating is a sexual act in which a man's sexual partner, female or male, takes their partner's entire erect penis deep into the sex partner's mouth, past the epiglottis and into the throat. The practice is a type of fellatio, a form of oral sex.
NSFW Example 1
NSFW Example 2
NSFW Example 3
NSFW Group Sex Example