A spa is muscle, heat and rest: someone works on a knot and you leave lighter. Sexology is speech and clinic, sometimes exercises to do at home, very little oil. Tantra, in this part of the world, usually means conscious contact with a story about energy. Yoni is not a school or a religion: it names a territory of the body.
You can want one of those things and none of the others, and that is perfectly reasonable. The trouble starts when a single ad mixes them all so it never has to say what it offers. If reading it leaves you unsure what will happen, you are not missing spiritual information: you were simply not given any.