Lora to try to be rid of Flux nipples. In my experience so far, works nice at a strength of 0.73 but I haven't tested it extensively at a lot of strengths. It doesn't require a trigger word but it doesn't hurt to include the word nipples in the prompt.
I have also noticed this Lora works great with negative weighting to correct for situations where you are getting unwanted nipples. Like you prompt a woman in a bikini and she comes out with those high nipples over the top of the bikini. Enter it with negative weight in the prompt such as <lora:nipples:-0.99>. Also if you prompt a bikini and it omits it and makes her naked, this will often correct that as well.