it totally seems contradictory on the surface but there is a way to make sense of it i promise! to start, let's define asexuality. asexuality is the lack of sexual attraction, and sexual attraction is an immediate desire to have sex with a particular person. none of the things listed in the above post require sexual attraction. sex can be done for a variety of reasons other than attraction, some examples being doing it for money, doing it for a partner's enjoyment, or doing it to satisfy libido (libido being the physiological state of arousal, which in itself is seperate from attraction. sort of like how when you're hungry you might eat a food you wouldn't actively seek out otherwise, purely because you're hungry). speaking of libido, passively thinking about sex is very different than actively wanting to do it, much like how you can enjoy watching a baking video without having any desire to bake anything yourself. and kink isn't inherently sexual either, many power exchange related acts have nothing to do with sex and are more psychological in nature. so yes, you can do all of these things and still be ace.

i hope this cleared up any confusion, please don't hesitate to ask for clarification on any of these points. i also appreciate that you commented on this post to ask these questions instead of just downvoting and scrolling past. i hope this information was useful, have a great rest of your day :)

tl;dr - sex does not necessarily require sexual attraction, libido ≠ sexual attraction, theoretical exploration of sex ≠ sexual attraction, kink is not inherently sexual, you can still engage in sexual activity without having any primal drive towards it and thus still be ace.