Okay, I personally think all filmed porn is a no-no, because there are ample testimonies out there from women who have left the industry which show that a lot of what goes on is not consensual - and as the end consumer, you cannot tell whether the video you're watching was made by consenting adults or made under coercion. So you could well be watching filmed evidence of someone actually being raped. If you can still get your rocks off in the knowledge that this might well be what you're watching, you're a bit of an arsehole, IMO.
(Written erotica for the most part I have no problem with - though if a partner was heavily into torture/rape fantasies, I would seriously be questioning whether they were the person for me - especially a man, as they couldn't argue, as many women do, that it was all about fantasising about being overwhelmed and a guilt-free fuck, because as a man they'd be fantasising about being the one doing the raping.)
Second - barely legal/teen stuff. That would be well into LTB territory for me - in fact, given that you have daughters, it would be into "your stuff in binbags out in the back yard, change the fucking locks and I don't fucking care if that's illegal" territory. That's just fucking sick behaviour.
Yup, you can't police what people fantasise about when they orgasm. You can however decide whom you choose to be in a relationship with.