This dream had me stumped for a minute but here is my interpretation based on what you have written:
I'm not sure if this has to do with your sexual preference. I have found some dreams to be an indicator of something that has nothing to do with what is actually being shown.
It seems as though in your waking life, you might not feel as if you're in control of your relationships with others romantic or otherwise. When you sleep, you attempt to control all around you.
The stomach is a very interesting visual. While we don't control the weather and are at the mercy of free will (we can't make others do what we want--it has to be their choice) We can control what we consume. [that's what people who suffer from eating disorders express]. The stomach, along with the shoulders is another place where people will hold tension [ulcers, nervous stomachs, etc.]
So you dream about the stomach--not yours but other people's stomachs. There is also indication of a hidden hostility for you in this power. You can do what you want with other people's stomachs. You can make them feel good, you can act out your hidden hostility towards them. The power is so intoxicating to you that it arouses you.
Perhaps it is a call for you to not keep things in when communicating with others. While we can't make people do things, we can express how we feel.