A few years ago whilst living/working in the usa i helped an ex get away from her verbally and mentally abusive husband and we moved into an apt near where she worked, (nurse), during one sunday afternoon when we`d been together some 3 mths we were enjoying sex, her on top, we both came and leaning fowards resting her breasts on my chest she leant further forwards and whispered in my ear, "would you like to fuck me in the ass?", aged around 55 at the time, had just cum but with that request ringing loud and clear i got her on her back, comfily resting her ass on pillows, slightly raised, got her legs high and wide, got hard again at the sight of her wet pussy and tempting ass, approached her tight ass, started ever so slowly to ease myself into her and promptly, due i think to the sheer mind blowing excitement she`d bestowed in me promptly came straight away with much laughter and a tinge of embarrassment and regret.
We persevered several times a day, early risers etc and shortly after really got into it, she said she`d enjoyed it in a past relationship and was good with our relationship, enough to trust i wouldnt go at her ass like there`d be no tomorrow.
Lots of lubrication mixed with her own natural lube, positioned on her high bed with her ass cheeks right on the edge, legs high and wide, sometimes grasping her ankles i`d approach her ass and going ever so slowly, watching her expression, listening to her say ok and/or stop or slow down, not caring how long it might take i`d slowly get a bit more and a bit more inside her to the point where her inner muscles would relax and i`d kinda just pop past the last membranes and be inside her. slowly going fully balls deep, easing back she`d let me now how it was feeling and once relaxed and comfortable would say it`d be ok to fuck her just as in normal sex.
practise and patience would allow us to enjoy anal for quite some time, the best and most surprising being when she first came doing it, a chest reddenning, heart pumping muscle spasming orgasm for her that caught me completely by surprise, even aged 55 !, very best after that was when we just enjoyed ourselves with massage, nipple and clit tweaking and staying inside her and she came twice in the space of around a half hour, she would always laugh and joke how she`d have "wind" for a couple of days due to the natural and artificial lubrication lol, another poster rightly quoted it brings you closer simply from the purely intense intimacy of it all, the trust and sharing, the communication etc, i feel very sorry at the same time for other posters whove had bad experiences with clumsy crude partners who just wanted to do anal and who made the experience such a painful and unpleasant occurence they were put off trying it again.
theres so many nerve endings down there plus the g-spot is just a membrane away on the other side of the vaginal/anal wall. i found her collection of toys just before we parted company, had we shared them sooner i`m quite sure we`d have enjoyed each other that much more and that much sooner.