Sentence:  According to Scotty, who should have played the accordion, and did he, Dr. Bowles now wonders, grow up to be Scotty Boy Potty and was all this merely a terribly tropish bit of biz <WSD>foreskinning</WSD> the man he would becum, nuntheless, according to Scott, if one waved bye-bye up and down, i.e. flapping, versus side to side, i.e. wiping, one was a fag. 
Meaning of the word marked with <WSD> tags:  To sexually stimulate by manipulating the foreskin.