At one point, Spike is advised in counseling to take care of an egg as if it were a baby and allows Shane to care for it himself, but he succumbs to peer pressure and throws it around at a party, causing Spike to lose trust in him.
At some point, Spike is advised in counseling to nurture an egg as if it were a child and allows Shane to care for it himself, but he succumbs to peer influence and throws the egg around at a gathering, causing Spike to lose faith in him.