Monster Quest - You are chosen to participate in diplomatic ties with aliens. So, how do you expect to form relationship; definitely sex. So, you participate or train alien how to do sex.
Just keep choosing right answer to move forward in game. You will be exposed to lot of innovative stuff. However, the game is a paid one (you need to buy credits) to play this game, but erotic stuff is absolutely stunning. Kissing, boob fondling, missionary and 64 complex positions; all are present in a very elegant manner.
Forget about animals, imagine hot girls or your favorite celebrity as alien; you would love this stuff even more.