Question to /y/ (i don't usually go to yellow boards, so I'm not sure where this question should go)

I've been masturbating by putting a tube inside my ass, and wanking it off to r34. It works fine, but I kinda feel bad about myself.

Should I stop? It will take about a week for ass to stop craving for tube, but I've been fapping to rule34 for so many years (way before ass play), so I literally can't fap to normal porn anymore without a hard and long adjustment - I simply don't feel the pleasure.