Many hosts will, you just have to ask them directly. They wouldn't want any joe-schmoe signing up then putting some half-baked adult site with broken code onto it... they need to be sure that you know what your doing... plus they will have a special TOS/AUP for you, I'm sure, as most of those sites operate a little differently in terms of overages and such.
Jacob - WebOnce Technologies - 30 Day 100% Satisfaction Guarantee - Over 5 Years Going Strong! Website Hosting, PHP4&5, RoR, MySQL 5.0, Reseller Hosting, Development, and Designs
I can recommend ProTGP. I have been with them for two years now. Support has always been tremendous for me, with e-mail answered in 30 mins or less and they have live support too. Excellent service considering how little I pay. I also have an account with Sunwave, which is their non-adult branch.
I have a service monitoring the uptime of my site and I seem to have had zero downtime in two years.
To me, ProTGP has a rock-solid feel to it and I like the way the control panel area is set up. I earn a living from my sites, so I am pretty fussy about my hosting.