Great idea Kiala!
I remember I always was scared my partner would to try to penetrate me with his fingers “by accident” when he was going down on me. The moment his fingers came near my vagina I already lost all my sexual appetite cause I was afraid he might put his finger(s) inside, not on purpose, but more like “in the heat of the moment” or something like that. I’m not sure if you guys recognize this. What helped me was to change the position we were in: I asked my partner to sit up in bed with his back against the wall, and I positioned myself between his legs with my back against his chest. In that way he could reach all important positions (like my nipples and clitoris), without being able to penetrate me with his fingers. That thought alone was enough for me, and I now get most of my orgasms this way: while being wrapped in his arms. That feels “safer” to me.