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Love the new skeleton designs. Now I want to rip those claws from melee skeletons and use them as weapon

There is gay sex

The only NPCs you can't have sex with are the skeletons. 

To unlock the bed sex with Sophia do the quest in town. For giving animations, seduce and wait for the NPCs to emote an invitation like you do.

Customizable tongue and "Allure with tongue" emote? 

The emote could be the character holding their middle and index fingers in a 'v' shape to their mouth and sticking their tongue out full length.

Speaking of tongue length. If you do decide to add togue customization please let us make them Long.

It does have M/M content

Loving the game so far, can't wait for more content. The art style is immediately recognizable and VERY pleasant to the eyes. Excited to see what other mechanics you might add. Perhaps a perk system, where you get perk points by leveling up gates. Expanded cooking/potion crafting with craftable appearance change potion?
Also, would you consider it, and if so, how much would it cost to get ones OC added to the game as an NPC? For example, a merchant.

Edit: Forgot to add a suggestion I really hope you implement. Always have one gate the current max level.

You can buy a deliching potion from the Potion Shop in town

After becoming a Lich, the Alchemist will sell you ego potions.