I also recommend abstinence (from sex….with other people, that is). Not only does it demonstrate commitment and focus on climbing, it also does not require energy wasted on foreplay, avoids the dangers of oral cancer that arise from cunnilingus, the dangers of gaining fat that arise from late night dinners, sleepnessness that arises from snoring, and as studies on mice have demonstrated, bachelor mice live a lot longer than bonking mice.
All of this should improve your climbing experience.