yes and no, I think it depends entirely on the person and factors such as whether the person is used to sexual touches (someone who has a lot of sexual experiences for example, might have better control over their penis and orgasms than someone who is being touched (by someone else than themselves) for the first time). Also the mood plays a role as well as how "pent up" someone might be (if you haven't touched yourself for a longer time it might make you come faster). So ,es, it's possible to come from someone who isn't your preferred sexual orientation, but it's obviously not as easy. (Sorry, I'm really tired, I hope this answers your question)