Suppose A is a trivial loop ( boundary of a disk) in the torus and B is a meridian of the torus. Suppose also that A and B intersect at two crossing points, then what is the intersection number of A and B in this case? Can we have such a case? I am confusing because the orientation of basis of tangent vectors is preserved along the trivial loop A in the torus, so we can not have positive and negative orientations at the transversal intersection points, is this true? Any guidance or comments is highly appreciated

thank you in advance