I think the drinking and the upsets have probably more to do with Dana's conflict between her studies and VH as it was said the other day she has possibly a problem with the universitiy etc.
I think Dana & Chris are very sound but she does enjoy her sessions with the girls that have been invited round and i have noticed that Dana does go at it with another girl with great enthusiasm. When Chris get going with another girl Dana seems to really be encouraging him as she often looks at the cam and gives a thumbs up sign lol.
The best example was when they had the first girl round, Tina, who stayed over and the following morning when Chris was at work they had a great morning on the couch with great passion especially from Dana so i think she has a very strong girly side which she loves to explore.
Even with Ramona the other night who refused to get undressed, the kissing between them was very intense and Chris even walked away at one point.
Definitely think Dana has a very strong girly side whilst being happy with Chris but then what do any of us know really.