bob heslip , 50 , suffers from neurofibromatosis type 1 -lrb- nf-1 -rrb- .
condition causes noncancerous lumps to appear all over his body .
he accepted offer to perform at freakshow on weekends as ` bubble boy '
other performers include bearded lady and america 's smallest couple .
he said : ` when i met the performers , there was a feeling of belonging '