>>18485393 (OP)Just don't wear graphic tees, sweatpants,snapback hats, skateboarding apparel/shoes, hoodies, anything juvenile.
Button down shirts look good on everyone. Buy jeans or casual pants in your size. Buy blank white t shirts from Walmart. Get a pair of neutral leather shoes or similarly style boots. Take a trip to a thrift store and purchase multiple outfits following the original avoid list. Wash your hair, style your hair, groom your face. Do this and you will mog manchildren while appearing normal and well adjusted to high fashion geeks. Dont start wearing huge jeans and other in vogue items or you will be left behind in the dust.