You just have to remember that these feelings you are calling "arousal", are not that. For you, since you haven't watched porn in a long time, what you are feeling is likely M (plus fantasy) cravings/withdrawals. I find I can get just as much of a blast of dopamine from M with fantasy as with porn, so I personally don't think one can heal while doing that whatsoever. If you go for a couple weeks hardmode you will hit flatline and won't have to deal with that feeling anymore. IMO, Real arousal does not make you crave jerking off or looking at P. In fact, I find real arousal is a firewall against relapsing to those things, because having real arousal means you have a reasonably well-functioning reward system, and that means you have enough dopamine receptors to make you feel good enough without needing or constantly craving porn or whatever in the first place. To me, the fact you can't M without fantasy means you still have quite a ways to go before your reward system has healed to a reasonable extent. Our brains have the ability to change habits very quickly, if you just try to go a few days, then a week and so on you may find it pretty easy. For me, if there is no porn attached I have basically no want to jerk off whatsoever, because I never made that a habit. It should be a lot easier for you to exterminate this M habit than it was to get rid of the P. And then, after a bit you can see what real arousal feels like, because I'm pretty positive what you're feeling is withdrawal cravings. Not arousal. Once you've done that, and really get rebooted, your want to get rid of sexual fantasy and replace it with more wholesome fantasy happens by itself. I know this for a fact I've been super-rebooted in the past multiple times and I could get rock hard just thinking about making out with girls, and by the same token other times when I've watched too much porn not only could I not get even the slightest bit aroused thinking about that kind of thing, I couldn't get aroused thinking about ANYTHING, no matter what. True rebooting changes your brain in incredible ways, but it takes a while to feel them. I think it is awesome you've went 300 days without P, but it seems you've replaced P with F+M, and that in my opinion will not allow you to heal. Try going a few days without.