1. Nf3 is a bad move in the bughouse. Nf3 intending to Ng5, Nxf7 is not good because this idea can be easily refuted.
Nf3, e6, Ng5, Qf6, Nxf7, Qxf7.
Place the knight on g6, Qe7, pawn on f7, Kd8 and Black king is surprisingly safe.
There are many other good options for White such as 1. e4.
