Placiosexual is an micro-label on the asexual spectrum defined as someone who enjoys performing sexual acts for other people but does not want them reciprocated. Placiosexual people may be sex neutral or sex repulsed when it comes to having sexual acts performed on them.
Placiosexual is not the same thing as simply being dominant, or having a sexual preference. Someone who is placiosexual may being repulsed at the thought of someone preforming sexual acts on them. This may cause them to lose any sexual desire or attraction. This discomfort may be caused by dysphoria or similar discomfort with one's body, but it does not necessarily have to be.
The opposite of placiosexual is iamvanosexual.
The prefix placio- comes from the Latin word placere meaning 'to please'.