As long as people do it safely, having a lot of pyschologically and physically healthy sex can be a wonderful thing, says Stephen Snyder , ., a sex therapist based in New York City—“that is, if it's taking you someplace special and making you feel good about yourself,” Snyder says. “But if it's not doing anything special for you, and not making you feel good about yourself, then it's not likely to have much of a positive impact on your life, and may have a negative impact. Again, it's the quality, not the quantity, that's important."
The only problem with waiting until your thirsty is if, like me, you lost your thirst from forgetting to drink water like I did in the 80's. I would play full court basketball for a few hours each day and then I would not drink out of the fountain at the gym because I knew it was not filtered water and then I would forget to drink when I got home and then I would eat dinner and have a glass of wine and go to bed. I never realized that I was dehydrated until I had my blood checked for something else and it was obvious due to the lack of distance between my blood cells that I was seriously dehydrated!