Your poor husband-nothing worse than gum-where you don't want it!-I don't chew the stuff-I think one looks rather bovinesque(cud)
and please don't get me started on bubble blowers and cigarette butts out the car windows!! I've seen birds get all clogged(ahem) from trying to eat the filters, another good one is parks and used condoms-doggies can pick them up and heaven knows what can happen!!