What is the anime where they have inercourse with the different monsters

It sounds like you're referring to anime that falls within the "harem" or "erotic" genres, where characters may have romantic or sexual interactions with various monster or supernatural beings. One popular example of this type of series is **"Monster Musume: Everyday Life with Monster Girls."** This anime features a variety of female monster characters engaging in romantic and often comedic situations with a human protagonist. If you have a more specific show in mind or need more recommendations, please provide additional details!