Anal sex tips

Dainisha • -she`s the love of my life
Me and my SO tried anal for the first time last night and I would say once you get passed the pain it is so pleasurable and something I thought I wouldn't enjoy. I climaxed instantly! Only thing is I can only take it for about 5mins because it will start to feel like I have to sh*t Lol. Anyone ever tried it or have any tips?