You can't; the sentence is an intentional simplification for the purposes of a joke. A torus has two non-trivial elements in its 1-dimensional homology group: t

You can't; the sentence is an intentional simplification for the purposes of a joke. A torus has two non-trivial elements in its 1-dimensional homology group: there are two types of loops that I can't contract to a point on a torus, around the handle and orthogonal to the handle. A lion with 1 entrance and 2 exits has at least 3 such loops one around each entrance, and 3 more (I think) passing through each of the 3 choose 2 aforementioned holes.