I'm not stereotypically gay, but some pervy guys thought me and my step sister were a lesbian couple. They kept on hitting on us.
pervy guys being the important part of that sentence. Note: These guys 1. Assumed you were both gay 2. Then tried to pick you up, thus invalidating the whole 'gay' idea So one of two things likely happened. 1. They REALLY thought you were lesbians, but don't think lesbians are real and tried to get you as a challenge 2. They didn't think you were lesbians at all they just thought two of you together would be better than one or the other. Fantasies!
I've had that happen with a few of my friends. That's where you say: 'none of your business. Go away.' and if they don't make a scene. 'Leave me alone, man, I'm not into you' or 'quit harassing me' work well at large volumes. If they are older 'Pedophile!' would probably have a nice effect as well... point being, stay safe and if they are harassing you don't be afraid to make a scene. I don't want you to get groped or followed.