I bought an Aneros last week, but just got the chance
to use it this evening. Some things I noticed:
It was easier than I expected to insert the Aneros. I
first used a baby syringe full of K-Y after loosening up
my anus with some Astroglide. After liberally coating
with K-Y any part of the Aneros that might get inserted,
I eased it in. I really hadn't had much anal play since
a VERY anal girlfriend 20+ years ago (my wife won't even
consider anything anal -- her loss!), but the Aneros
slid in with little trouble in just a couple of minutes.
I used the "on your side with your knees pulled up"
position described elsewhere in the forum. Even at the
Aneros' thickest part, it was no more difficult or
uncomfortable than a doctor's rectal exam.
I did several minutes of breathing exercises, and I
quickly got used to the Aneros. The only uncomfortable
part was the one that pressed against my perineum.
After several minutes of breathing, I tried a small
voluntary contraction. To my surprise, I found that it
went into a large involuntary contraction -- I had to
check to make sure I hadn't pulled the Aneros all the
way in (note: that's not possible, but it felt that
way). The big involuntary contraction happened again
a couple of times; it wasn't a problem, but it was
distracting. In hindsight, it might have been better
to do more warmup breathing; I don't know if that might
have made a difference.
I found that rolling onto my back and thrusting my
hips was very comfortable, and probably the most
pleasurable for me.
I initially noticed the pulse sensation reported by
others, but this faded after about 15 minutes. After
that, I noticed some very small involuntary "echo"
contractions after small voluntary ones. It felt to
me like a swing; a well-timed nudge led to another
swing of the contractions. I felt like I could build
on that, but it didn't go anywhere (I might have been
paying too much attention to the swings). Throughout
this time, I (surprisingly) didn't have an erection.
Unfortunately, I had a time constraint and couldn't
go as long as I wanted to. A couple of hours later,
I still have some residual fullness, probably from
some left over lube.
Overall, it was a pleasant experience. Some feelings
were new; some I remembered from previous anal play.
I'm looking forward to trying it again to see what
happens.