Noncon tribbing is A+ and I've also considered, like, Enhanced Tribbing with the victim wearing a crotch rope to increase the surface area. Or maybe even some other sort of toy where the side the rapist has access to has a more pleasant texture than the side pressed up against the victim? If it's the direct contact element of tribbing that you're there for, that might not do it for you, but otherwise it opens up some possibilities!
Re: KINKTOMATO - noncon
Noncon tribbing is A+ and I've also considered, like, Enhanced Tribbing with the victim wearing a crotch rope to increase the surface area. Or maybe even some other sort of toy where the side the rapist has access to has a more pleasant texture than the side pressed up against the victim? If it's the direct contact element of tribbing that you're there for, that might not do it for you, but otherwise it opens up some possibilities!