Yeeeeah, that happened to me TWICE.  Good clothing choices and supportive undergarments and they look normal at the bar in dim lighting.  Get 'em home?  Stretch marks and sags followed by "I had bariatric surgery; I used to be a lot bigger."  Both times it happened I could not get it up.    Bonus?  They both had herpes as well.  I guess poor judgment extends beyond diet, apparently.