Misc: what kink's song referred to a transvestite?

Questions

Hippopotamuses do ---------- percent of their vocalization under water.?

If a frog's mouth is held open for too long the frog will---------- .?

If monkeys eat too many un-ripe ---------- their tongue and eyes will turn green.?

---------- , koalas and Komodo dragons all have two penises.?

Iguanas, ---------- and Komodo dragons all have two penises.?