Look at those models pouting1 for the photographers!
(positioning their lips in a sexually attractive way)
If she doesn't get what she wants, she pouts for the rest of the day (positions her lips in a look of annoyance).
You don't have to grimace2 every time I eat raw garlic. I happen to think it's delicious (make an expression of pain or strong dislike). I arrived late and she just scowled3 at me (gave a bad-tempered, angry look). He was leering4 at us. I felt very uncomfortable and wanted to leave (looking in an unpleasant, sexually interested way).