I've been into P/E for a while now and although I'm not huge or anthing I'm pretty thick. I can just barely fit the head into a toilet paper roll now. I'm startingf to worry about overdoing it and not being able to get oral sex anymore. The last girl I was with only did it for a few minutes and It got me thinking? What do guys think the limit is for average women,5 inchs around,5.5,more?