No special trigger word required.

You could start with a simple prompt such as: "From a man's point of view looking at a woman giving him a blowjob.", and then add details from there. Or try something totally different.

Tested with the regular Krea 2 Turbo checkpoint at a strength of 1 (but also works at lower strengths). No additional NSFW LoRAs required to get good results.

Fully original work.