This lora is a combination of sitting footjob position: stepping on penis/balls while improving details of feet in the same time, sort of using viewer as foot rest. It works with other footjob positions like standing footjob with good prompts. 

Example prompts:

best quality,amazing quality,very aesthetic,absurdres, incredibly absurdres, masterpiece, uncensored, cinematic lighting, cbtfootjob, 1girl, 1boy, sitting, testicles, pov, straight-on, from below,couch, (arched soles:1.3), foot focus, soles, feet, dorsiflexion, feet up

Best resolution: 896 x 1152 (portrait) > 1024 x 1024 > 1152 x 896 (landscape)

Best samplers: dpmpp_2m {karras, sgm_uniform, exponential}

Although it works with vpred models but I found it works better with EPS models, particularly OneObsessionBranch_Mature_MAX_EPS, if used in vpred model it tends to overfit so give it a weight like 0.8