As a fanatic pegger I’m always surprised on how much pre cum (The clear liquid) my husband makes while I’m pegging him
Earlier this week I got him to wear a condom to catch the amount of juice and I was surprised as only after 20 minutes of pegging the condom was almost full - about 20ml
I ask others - do you get surprised on how much you make 
Oh yes, I produce a lot of pre cum while pegged or during other anal play. There are times it looks as though I am ejaculating.
I get hard from the foreplay we do before she pegs me, so I’m oozing a tiny bit then. But when the dildo is inserted, I have precum all the way down my penis - not all the way around, usually in a thin line.
I haven’t measured it, but he does make a lot. One of the joys of someone else doing some of the pegging is that I can clear his cock of pre-cum whilst the pegging is happening, as I love the taste of pre-cum.
@KinkyMira - I agree the taste of pre cum is very nice 
although it’s been a while, I tend not to precum that much…but when I reach orgasm, it’s usually a relatively large volume of cum ‘proper’
Yes, I also produce a lot of pre cum during anal play also sometimes I get extremely hard and other time’s not at all.
I prostate milk myself using Lovehoney glass 7bibches glass beaded dildo and can produce quite a lot of pre cum which is always good to see!
@Fire_Ice1 - it just surprises me how pegging can relax my husband so much but also produce so much - clearly I’m going well in my job
Using anal toys on my prostate the precum starts within about 20 seconds and just keeps flowing.
Sounds like you’re doing a very good job. My wife isn’t interested in pegging me which is fine, I get by with my toys. As soon as I enter myself and start using them the pre cum starts coming.
I’ve always wanted to try pegging. My fwb is up for it need to get a strap on. The only things I’ve had in my ass is my fingers and a little bullet vibe I have
According to WebMD, pre-cum comes from the Cowper’s gland, the main source of the pre-ejaculate fluid. It is situated below the prostate and is also called the bulbourethral gland. Pegging must stimulate the Cowper’s gland in a way that an erection does not.
Mrs W here …
Oh yes, when I am pegging Mr W I have noticed a large amount of pre-cum on him, I thought it was just him, there’s often so much I thought he had cum, but later events indicated that was not the case …
Yes, rather a lot! We’ve not thought to measure it but what a fun kinky experiment 
I precum loads and very easily
Lots.
No idea the volume. It’s probably less than I’d think. Or more than I’d think.
My wife makes me wipe it off my head with my thumb and lick it off myself. I get in trouble if any of it drops on the bed or is otherwise wasted.
I don’t make hardly any. Everybody else seems to though. 
maybe we’re doing something wrong? I do have a big first cum though. 
According to the WebMD article, “What Is Pre-Ejaculate?”, the amount of precum is variable. I would not focus on the amount. The article says:
“Pre-ejaculation fluid neutralizes the acidity in the urethra. Urine is often acidic and leaves an acidic residue in the urethra. Sperm don’t thrive in an acidic environment. Pre-ejaculate provides a basic (alkaline) pH for the semen and urethra.”