For those triggers that cannot be avoided, you can try to compensate with extra care in other ways. For example, when your child has a cold, you can try to ensure he gets lots of sleep and nutritious foods. Some triggers may become more of an issue as your child gets older.
barnacle. n. 1. (Animals) any of various marine crustaceans of the subclass Cirripedia that, as adults, live attached to rocks, ship bottoms, etc. They have feathery food-catching cirri protruding from a hard shell. See acorn barnacle, goose barnacle.
Giant Genitals. Relative to their body size, barnacles have the largest penises in the animal kingdom; they can be up to 40 times the length of their body. I think that would be a tad difficult to tuck away if that were the case for humans. Barnacles are sessile organisms, i.e. fixed and immobile.