Hi Shadow:
Alarm bells ring behind my eyes (talk about mixed metaphor) with the commas in #2 and #3. That is wrong. It's a compound sentence, true, but the comma is only required if there are
more than two sections in the compound sentence.
But I took English in the stone age and the rules have relaxed since. (Compound sentence with only two sections, hence no comma
)
There's another option on #2:
Lois gasped with surprise; she giggled when his beard stubble scratched her cheek. 
Artemis
