That is a most interesting question, Arckangel, that I've always wondered about, when a young particularly, straight identifying model puts his gay porn work out on the internet. We have several examples of that from right here on our forum. David explained that the very popular model Danny, had to quit the business when his family found out. Both the late Mike Robbins, and the current model Jimmy have shared with us that their straight friends know what they do, and it doesn't affect the friendships with their good friends.
Rob Ryder who posts on the forum, but not recently, also has explained in great detail how he told his father how he makes a living. There was also a very interesting recent thread on the forum started by Tampa regarding the handsome young Dustin Zito who appeared on MTV's The Real World, and how it came out during the series that he was a gay porn star on Frat Pad, as "Spencer". He is one article that I found on him.
http://www.realityblurred.com/realitytv/archives/the_real_world_25/2011_Mar_10_dustin_zito_fratpad
One would think that a young man who applies for a job as a gay model, would realize that his work will always be out there on line, and it could come back to "haunt" him later in life, as he pursues a career and a family. The decision to go into adult video work can certainly impact you for the rest of your life.