I would imagine there are a lot worse things you hope your daugther doesn't do then enter the world of porn.
In Stacy Valentine's documentry, they talked about it with her parents. They said she was just having sex, something everyone does, and that it wasn't a big deal.
Truth is, the top end stars make a lot of money. Jenna Jameson is a millionare. If done right, that profession could make a very comfortable life for these ladies.
I'm not a parent (that I'm aware of), but, I would imagine I'd want my children to be happy in the careers they have choosen. If that happens to be porn, well, then so be it.
You know, while there are a ton of female performers, there aren't that many male performers. If at the top of their game, some of these women might only have slept with a small number of men in her time in the jiz biz. Conceivably, depending on a number of things, a top notch porn star may have slept with less then 10 guys in her life. I'm sure the average women out there, including your wife or girlfriend, could have more under her belt. Basically, just because a women is in porn, doesn't make her a tramp. I think I'd rather have my daughter being fuck by Peter North, then by half the football team.
A couple years back, my buddy hooked me up with his girlfriend's sister. She was a very attractive girl, had an amazing body, and was an animal in the sack. She was also a few sandwiches short of a picnic. Many times, her uncle asked her when she was going to start stripping. Not that he wanted to see her (I hope that wasn't the reason), but that he knew she only had two chances in life to be succesful; marry rich, or sell her body. It wasn't nice, but it was the truth.
I don't want to say all female stars, but some, aren't that bright. Devon & Brianna Banks are two that come to mind. Seriously, if you are the father of these two, you're probably not blind to the fact that your kid is a stunning woman, with little upstairs. It can't be that much of a shock when they decided to use their looks and body to make a living.
Having said all that, think about one thing. I brought this up before, but. Take Sunset Thomas and Sunrise Adams. It's well known Sunset is Sunrise's aunt. Think about this for a second. Your daughter grows up and enter's the jiz biz. Then, your grand daughther grows up, and enters the jiz biz. Even more scary (if this is actually how the are related). Your little sister, grows up to be a porn star, then your beautiful daughter follows her down the same path. If having one family member in porn is hard, imagine having two.