I know this isn't BDSM-specific but I dunno any other subs where you can ask for sex advice and I do anal as part of a BDSM dynamic so close enough.

So like, I've been doing anal for like 8 years, mostly with toys, mostly solo until fairly recently. I know the basic tips of taking it slow, warming up, using lots of lube. I have no trouble taking things a bit girthier than your standard dildo or butt plug. But it seems like any time a partner penetrates me either with a dick or with a toy (like a dildo, with a thrusting motion), eventually it starts to burn. I use water-based gel lube and the toys are silicone and bendy. I have my partners re-lube often.

I don't know why it burns eventually though. It'll start out fine then after a handful of minutes of thrusting it starts to burn, and once it starts burning anything that gets inserted for the rest of the day will also burn, even if it's just a finger. It's not unbearable but it's not pleasant either.

Any ideas what I could be doing wrong? Do I need a different kind of lube or something? Maybe since it's water-based it's getting broken down and/or absorbed inside me? If I do need a different kind of lube, what kind? I've heard silicone lubes dissolve silicone toys. Any tips would be appreciated.