Astroglide gets sticky too fast--turns ya into a glue stick. Liquid silk is a personal favorite. Tried a little sampler once, and it far exceeded anything else in the pack, (which was most major brands including Eros).
For anal, I'd want something a little thicker. To be honest, I'd look for something marketed to gay guys. Elbow Grease is great stuff, but it's oil based, so it eats latex.
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