I can't fully agree. Given the same level of expertise in sex, the same level of care for a woman's pleasure... bigger - than average - is definitely better.
Monstrously huge isn't, of course, and not only for anal sex. My jaw got dislocated more than once trying some too-big-to-fit 🙈
Boys, whatever you have a small or huge penis... what you have to remember is that a woman enjoys sex because of the feelings (doesn't have to be love. It can be domination, extreme cuddles, or just feeling you are compatible...), not (only) because of the cock size.