While Starpaw is having a mid-life-crisis, Jayfeather tells her a story to help her calm down. In the story, he mentions that he was struggling to pick a mate - the same problem Starpaw was facing. He tells her that he chose Dawnsparkle over Stick because he wasn't able to procreate with an inanimate object.
It looks like a stick of wood. Duh!
- While Jayfeather's attraction to his Stick is hinted at in the Cannon series, it is never out-right stated that Jayfeather wants to get it on with piece of wood.