>>11391606
For me it's tentacle birth. I'm primarily a pregsexfag and I even slightly prefer man on girl sex over tentacle on girl sex, but I do NOT like humanoid birth. Or anything with limbs or eyes really. Tentacles on the other hand are just animate phalluses.
I really like the thought of being a tentacle man thing and my sperm just impregnates her with more tentacles, which get born later fuse back into me.
I used to hate the concept of unbirth for similar reasons to my hating sexualized birth until I came up with my own spin on it: melting into consciousness-carrying semen and "unbirthing" into a girl that way.