From left: Marlon Alexander Vargas (Fito) and Alex Hernandez (Bastian) in "littleboy/littleman" at Geffen Playhouse (Photo by Jeff Lorch) Infused with high energy of athletic acting supercharged by dynamic lighting and sound, the world premiere of “littleboy/littleman” at Geffen Playhouse tells of two brothers originally from Nicaragua making their way in Sweetwater, Fla. One is practical and driven while the other is a poet, dreamer and performer. Both try to uphold the lega