The trick is to present each opportunity, till you notice the trend of unbalance. to achieve balance you simply present less opportunities for what is excessive.
Example: your adventure has access to in this scene
A) Rampaging Orcs
B) Buxom Lasses or Strapping Lads
C) Something of value at reasonable access
D) A Brothel
Your adventure tends to follow the B and D paths. So you just edit the selection. The new list would look like this.
A) Rampaging Orcs
B) Lasses or Lads
C) Something shiney and within reason to get.
So you give more adventure options to make up for naughty choices. It can go the opposite way if the character is adventuring more than playing. This is the alternate example;
A) Buxom Lasses and Strapping Lads
B) Getting Something Shiney
C) The Brothel.
The last option is the linear method. You want to balance adventuring with bedtime. Make two or three stage scenarios. Giving the right proportions of each. Just tossing out a few ideas.
Amazons/barbarians kidnap local young men and women. Your adventurer rescues the kidnappee(s). After success, a just reward. That's a 50/50 sort of setup. It's all in how you break it down.
So for something a little more sex heavy; you start the hero being seduced. The seducer (after the fun) turns out to be a sorcerous or succubi (something of the nature) who will curse the adventurer as a price for their deeds. The hero then has several options, find a way to break the curse, get back at the curser, or perhaps learn a secret in which to blackmail or thwart the villian or villianess. When all is normal, the adventurer gets revenge, or lives up the nightlife.
Really you have many options, they trick is really just planning.
That's my two cents...