When your fap material gets old, what do you do?

This.

Oh yes, nothing like listening to someone get all hot and heavy, I remember a friend of mine once heard my husband and I going at it, apparently he got pretty rock hard and had to take care of business. I admit it totally boosted my ego XD

Like Parie has said, it's basically that. If you still can't get it, here's an example.

http://www.literotica.com/audio/2011/sound_2011_03/wettmuse_amissiveinecstasy.mp3

I've tried erotic audio of female masturbation a while ago. That turned out a lot hotter than I expected.

Search for newer one.

I have a lot of H-audio.

OT: Doesn't get old for me.

Most of the time, I just browse along nosbleed or sankaku complex and if anything catches my eye, I investigate.

Most of the time, its subsections of a genre I allready like.

I try to take a break for a week or two. Then when I come back to it I search for new stuff that my dick might like.

I download new stuff and then after a couple months I go back to the old stuff and it seems like new.

I switch to sex.