Pjur Back Door has jojoba as a natural relaxant ingredient and I was surprised at the impact it had on my erect penis. If this had been my first time having anal sex, I would have thought it was a disastrous experience, so for this reason, I would suggest something else.
The Original Bodyglide is great stuff. I like to use Maximus as it is a thick water based lube that we use for anal play very frequently. Carrie Ann really seemed to like Supersex Anal Lube and I trust her judgement, so that should work too.