I’ve had the “i much prefer small boobs” comment lots of times. I’m a C/D cup so wouldn’t say I’m particularly small chested.
Ive also had the “love your huge ass” type comment during doggy style.
Oh and there was one bloke who was stroking my thighs and pointed out he could feel my stretch marks and found it “cute”.
A repeat client (probably 2-3 times a year for a few years), did tell me during a paid phone chat complimenting me on my appearance more or less said it would be perfect if my breasts were a little bigger.
This has happened a couple of times in personal life about 15 years ago, actually during sex. Never even occurred to me to comment on the other person's performance (and I could have because they had their own hang ups and issues). Held up to be perfect!