 This seems to be a plausible explanation on a first pass. Indeed, a perceptual theorist can even give, plausibly, an evolutionary story about why these perceptual experiences should feel unpleasant: they represent or signal a property of body parts that tends to hinder survival. However, can the same sort of explanation be given for other intransitive bodily sensations like itches, tickles, tingles, and orgasms? Perhaps it can be done for experiencing orgasms, which are usually intensely pleasurable and has obvious evolutionary benefits (Block 1996, Tye 1996b, Aydede 2019). But what about others? Itches have an unpleasant quality to them which normally makes one want to scratch the spot where one itches. But tickles and tingles can be pleasant at times and unpleasant at others, as well as affectively neutral at still other times. Still, the concept of a tickle or tingle is like the concept of a pain in that they apply to the acts of sensing or experiencing, rather than to what external conditions these acts may be representing — if they represent  anything.[18]  Further, gustatory and olfactory experiences can be pleasant, unpleasant or affectively neutral, yet the acts of sensing involved in the exercise of these sensory modalities seem to be largely transparent in that we apply the relevant concepts like SWEET, BITTER, etc. to the external objects of these experiences in the first instance, and only derivatively or incidentally to the acts of sensing or to the experiences themselves.