It's tough sometimes! Since I write all the original songs, it's my problem to teach them to the others. Sometimes I just sing along with the one singing lead, over and over and over and over until they get the melody right. I write up the lyrics and chords on a "lead sheet" so everyone can follow along during the learning stage.

Then the issue is feel. I use the phrase "consider the content" frequently to encourage some interpretation. I try to stay out of phrasing suggestions, unless a particular approach really bothers me and doesn't fit my intention for the song.

Harmony is a different problem. One member of the band is less able to find harmonies than the others, so sometimes we just give him the melody on the chorus while we jump in with harmonies above and below. That seems to work well, since the melody is heard most frequently and is easiest to learn.

Sometimes I pout and stomp out of the room...

At some point, and what is most difficult for me, I have to stand back and let the song evolve into what the group creates of it. Most of the time, it is better than I ever imagined.