the thing is, Anal has become the nirvana for fucking because it is unnatural and generally hurts the girl on the first few attempts and so fewer women do it so its sort of a triumph to get it.  But in reality, the pussy is designed by God or Darwin to make dicks cum hard and deep, to impregnate.  The ass is designed to store up poop and then let it out.   The sensation is less, it's got a tight clamp on the entrance gripping your shaft but then is looser and softer inside where the more sensitive head goes... pussies have ridges and a muscular sheath.  If we did a blind taste test as it were, just based on dick feel, nobody would choose ass over pussy, its just the forbidden and hard to get aspects.  Of course, mouths are made to chew up and swallow meat, so not an ideal place for dick either, but technique can overcome that, but the ass?  Don't know if there is a learnable technique to make the ass actually better.