Updated detail: During sex a couple years ago I got brave and asked my wife about the biggest dick she's had. She told me (note that she had a couple glasses of wine in her) one of her times "the guy was HUGE". Just saying that got me pretty hard. I asked her how big and she said she could only fit the tip in her mouth. When she decided to try it out she climbed on top of him so she could control the penetration. I asked if he was long and girthy or just long. Her reply was "his girth wasn't the problem". She said she could only take about half of him and with that much, he kept hitting her cervix. She said She didn't like that part. I asked if she ever repeated with him and she said he showed up at her apartment sometime later but had a friend with him expecting a threesome. She absolutely was not into that so she made them leave. I wish she would have tried it. Another time she went to this guy's apartment and started having sex right away like she went there just for that. She said he got rough with her and started spanking her and throwing her around. She was uncomfortable with that so she didn't go back to him again.