I would stay away from "try to keep safe" because its very vague and will mean very different things to different people.

I think there's a responsibility to make a sincere effort to do no har and to own one's
Mistakes and shortcomings.

I think there is a responsibility for honesty and transparency.

I think there's also a responsibility to make sure that the concepts of consent and limits are understood and encouraged.

If there is a sincere effort to not do harm, honesty, and a foundation in consent and limits, then I have no problem with people shaping the relationship however they want, whether that is play only or something more intense.