https://civitai.com/models/49795/ugly-bastard
The idea of the LoRA is to not really need any trigger word, but to replace how the male looks, in particular in NSFW context.
How to use:
Weight 1.0 or more if needed, regular CFG
Use nsfw-related tags, e.g. sex, vaginal, anal, fellatio, handjob, gangbang, etc.
Male tags to increase effect: old, old man, ugly man, fat man, mature man, manly, muscular male, etc.
I recommend including the tag hetero
Warning! Most of male tags should be used moderately and with very little weight, if any! For example: (fat man:0.1) or (ugly man:0.2). Don't exaggerate on the male tags and their weight in the prompt, otherwise that's what you'll get. The model was trained to have a strong effect on the male appearance. Be sure to include a few female-related tags. Or use a female character lora.