Answer the following question, with explanation first. One of the following sentences is nonsensical. Which one is it?
Options:
- Sentence A: "A kiss is an act in which two people express affection for one another by pressing their lips together"
- Sentence B: "A hug is an act in which two people express affection for one another by pressing their lips together"

A hug is an act in which two people express affection for one another by wrapping their arms around each other.
So, the answer is Sentence B.