Once there's a 3 - 5 to 1 ratio, another male will join, and thus the ho effect has hit full circle.
Stage 2:Girl 2 joins them.
Stage 3:Girl 3 sees that girl 1 & 2 are getting all the attention from guy 1, and joins their group.
Final Stage:Guy 2 sees guy 1 hogging all the attention, and joins to steal some girls for himself.
Thus the Ho Effect