Got a vagina speed bump, and just got a Fleshjack Boys Joey Visconti's Butt - its amazing. I'm not that thick and it would be too tight for some but the first time I used it I pratically cummed as soon as I pushed it. Eventually edge, watching porn, for about 3/4 hr before having an huge orgasm, and I mean huge.
Neither is excatly like pussy or arse, but, if you want a good long session much better than using your hands.
Warm-up tip - I have a small, slim, glass bottle which I fill with warm (not very hot) water, lube it up and slip it in. When I go for it, just pull the bottle out and you have a good lubed up hole just ready for a hard dick. More convenient than warming it in water.