Lets see how many of us have images of frogs coupled up! Or even multiples of frogs. (I did in fact see one poor female with 5 males wrapped around her and later on had to fish one or two bodies out of the pond.. I hear ducks can drown like this too.
I don't have any coupling photos, but here is a Quacking Frog with 2 tadpoles, the result of a coupling. Quacking Frogs are notorious for mass matings, with balls of multiple frogs rolling around together http://www.pbase.com/larena/frogs