Here contemplation, according to Aquinas, offers something that every other pleasure cannot. Bodily pleasures are inextricably 0connected with sorrows (needs?) inasmuch as the pleasure of drinking arises through thirsting, which pleasure ceases when the thirst is fully quenched. (Another possible source - II-Iiae, 35.1 ad 2 - in English translations says every bodily effect tends towards sorrow - in the online Latin edition, it says defectum, however: Now all bodily effects, of themselves, dispose one to sorrow; and thus it is that those who fast are harassed by sloth towards mid-day, when they begin to feel the want of food, and to be parched by the sun's heat. What would also be interesting here is the weariness or whatever the word would be from intense physical pleasures, like sex - I know someone talks about this, but whether it is rationalists or Aquinas I am not sure)