I had no opinion - or even knowledge of pegging until about 55 - but didn't get interested for a while. Once I got curious, it took me about 2 years to convince my wife to try.
After the 1st time - she was not supportive. It took another year for me to convince her to try again. About the same time we started having anal sex - so maybe the chance to 'return the favor' plays into her thought process.
We both have orgasms from anal play - including sex, pegging and other combinations.