Aaron Hernandez -- My Jailers Are Tossing My Porn!

If you've been sending Aaron Hernandez masturbation material .... it won't do the trick, because it's going straight from the mail room to the trash can.

Fact is ... we've learned the former Patriots TE has been flooded with mail containing a Cracker Jack surprise -- nude selfies of fans hoping to help Aaron relieve stress.

Here's the rub. The jail has a strictly-enforced no-porn policy. The jail staff opens the letters and anything titillating is put to the side.

The porn should go in the trash, but anyone who's seen "Orange Is the New Black" knows where it goes.