My question exactly. I've done anal with guys but my wife never allowed it nor did I desire it with her. She had a very comfortable hole for me to fuck which gave her great joy and no pain. Guys do it because it is the only hole they got (other than a mouth, which I prefer). I tried bottom once and proved to myself that it did hurt and was not enjoyable. (Of course Raul is rather thick - maybe a thinner cock would have been better for a first time)
Damn. Didn't notice. Some 3-post guest bumped this 5-year-old thread up. Oh well. At least the OP won't complain about us guys responding.