1)Yea, that's clearly an opinion, and I wouldn't posit it as anything else. Describing something as great, i.e., "Sushi is great" can usually be inferred to be an opinion.
2)Thanks for recognizing that opinions differ on this point. You posited the situation as "Imagine if..." so I answered in kind.
3)Inferring the descriptor of "small peepee" to be not literal, but reinforcing symbolism for "insecure" is a natural step, just as 'small-hearted' or 'pusillanimous' can be inferred to not literally be representations of the size of one's heart or whatever one considers to be a soul. I'm not sure where you're inferring insecurity on my part.
Sorry if you feel I impose self-insertion on you, but you do seem to imply that you do so with your hypothetical pregnant mother situation. I don't know what creators expect of me when consuming their work, and I understand that many consumers choose to self-insert and have no problem with that. I'm not sure how not wanting to self-insert into a work of fiction in which horrific violence is occurring is "stupid". I'm merely asking people who choose to self-insert into works of fiction or depictions of fictional scenarios not to do so, and imagine it from that perspective, same as you ask people to imagine their mothers in a pregnancy porn film.
I'm not putting this on you, and sorry if it seems like I do, but many people who post on here about disliking or hating fetishes like NTR, BDSM, sharing, MM group sex, do so extremely emotionally and while belittling people who like or aren't bothered by those fetishes. Interpreting that as insecurity is not belittling but merely interpreting an emotional response as insecurity, like a guy who spends time talking about how tough he is and how inadequate he perceives other men to be.