Apart from the doggy/knotty ones you apparently crave now 😀 there is whole section of animal clones, some of I don't get like horse. It's totally not the best shape for penetrating, but alas. Anything Bad Dragon does is good bet... Well, there is also step up game from an ejaculating dildoes and it's ovipositor dildoes. You know when you have totally normal kink to be breed by tentacle/insect/alien overlord. They have big tunnel inside and you use to impregnate yourself with gelatine eggs that will safely dissolve in your body. Boy, I am glad my kinks tends not to need such preparations.