I second your love for 3DXChat, it’s my personal fave. OK it’s not free which is a pity, they could at least have made a free version where your (sexual) actions and interactions with other people’s avatars are limited, so more people could test the game for free before subscribing. Even so, I’ve been a member for years and it’s still my go-to adult game, however many other ones I try out. There’s actually quite a good gameplay write-up for anyone who wants to get a feel for the game here: https://www.3dxchatgame.com/3dxchat-gameplay/