The pose is mostly just prompting, but in combination with a hairy pussy lora and number of adjustment lora's (age, breast size, breast shape).

For pose consistency you have to keep in mind what is and isn't going to be visible. For example, if you use a lora that enhances breasts or is trained for vagina's then those things will always be visible, so then you can use those to limit what poses you'll get. If you prompt for breasts you'll be less likely to get people facing away from the camera, you won't get back shots, use vagina lora's and that's likely to be the focus without extra prompting.

If you're using an offline version of Stable Diffusion you can also use control net extensions to allow the use of depth maps and wire framing to set poses in pre-processing.