One reason I skip the sex scenes is that I find them boring and uninteresting to read 99% of the time. I'm honestly more likely to read explicit BDSM than I am explicit vanilla because BDSM is less likely to be formulaic. My second reason-- and this is the strange one-- is that I don't want to hear about real people's sex lives and that somehow extended itself to fictional characters. Privacy is a thing. The third is that I've finally stopped (mostly) dancing around the subject this year and realized that yeah, I'm some variety of asexual. The fourth is that, as someone else in the comments mentioned, I read fic because I want more of the world and shipping/romance is largely an aside to that, and probably why I largely ship canon ships. I love long, plotty gen fic or where the romance is a side plot. Shipfic just really isn't interesting to me outside of a handful of pairings.

OT3s are the best. I hate love triangles and adore polyfic. I was reading and writing poly before m/m! But my poly needs to have at least one woman involved; my slash ships remain few.

Sex scenes… I wrote one Explicit fic as a challenge to myself. It was difficult, not just because I'd never done it before. And then someone commented (as friendly concrit) that I hadn't done the one finger-two finger etc. sequence and it was wrong to not… only for me to tell them that I'd done the research and the sequence is unnecessary. I won't say "never" but it's extremely unlikely I'll ever get that explicit again. Fade to black works fine.