Nude men covering their genitals with one or both hands. Main activation phrases:

• covering his crotch with his hands

• covering his crotch with his hand

• covering their crotches with their hands

Your prompt should also specify that the subject is nude/naked. Recommend playing with strengths anywhere in the range 0.5-1.

Training

Trained on ~60 images spanning a variety of eras (1960s-present), scenes (solo, duos, groups, selfies), and genres (mostly candid photos, but some art photography, stills from movies, advertisements, etc.). Images were captioned with mostly natural language descriptions (not Booru tags). Example captions:

mirror selfie, a naked man is taking a photo of himself with a cellphone, in his bedroom, he is covering his crotch with his hand, muscular athletic body, some body hair, low quality, compression artifacts

artsy photo posted to Tumblr, a very pale naked man is lying on a circular carpet covering his crotch with his hand, taken from above, muscular toned body, beard, some pubic hair

artistic erotic black and white photo from the 1970s, physique photography, a nude young man is covering his crotch with his hands, dreamy expression, muscular toned body, pubic hair, penis partly visible, plain background

Known issues

The training data did include some exposed and partially exposed penises and testicles, but it seems not enough for the model to have effectively learned how to generate them. You can sometimes get decent results by including a phrase like "penis partially visible" or "genitals partly exposed", but it's a real crapshoot. I've tried adding in penis loras (e.g. TwinkCockXL) at different strengths, and it's unclear whether this helps to achieve this effect - more often it oscillates between hands or penis, or does a weird blend of them.

Hands are liable to be fucky because, y'know, hands.