<human>: Can you provide a brief rundown of the text in within 3 sentences?

So, as stated, I'm a female. I'm twenty two years old. This is a throw-away account, of course. My boyfriend and I had been talking about trying anal (I told him I didn't really have any reservations. I have lots of friends who love it, and you can't knock it until you've tried it, right?) He enjoys being penetrated, himself, and I hope to get more than a finger in there in the future, so I thought it would be the perfect bargaining chip if I let him in the backdoor. 

Here's the thing: ...I know we used the wrong lube. All we have is that warming KY jelly. I've used this on him, and he had no complaints. But when I tried to lube myself up with the stuff it burned like hell. ....Like...not in a pleasant melty way. Just...fucking....burning. But I continue, because I want to do this, and he's obviously hyped for it. We try for a good long time to get him in (because the lube burned, I didn't bother with much preparatory work...) but it just wasn't taking. Eventually, there's this sort of....silent pop. Like...all of the sudden he's through that first ring of muscle and I'm just like "NOPE NOPE NOPE." and I push him back and out. Then I tell him not to touch me for a bit because I need to have a little cry. It was bad. ...Still can't quite sit comfortably today. That's how bad.
<bot>: Used warming KY for lube, didn't do much prep, only got the head in, SEARING PAIN.