I think I echo many of the other posters - it's likely intended as a compliment, and you should just take it as that (or translate it into "another man who appreciates cocks thinks that mine is quite nice"). There are people who explicitly ask only straight women to respond, and perhaps you should do that.
This site is an odd combination of an online gay bar (or bathhouse), a men's support group (gay and straight) and a place for women to talk openly about their sexual experiences (and for some preferably only with each other). I stepped into a wymen's discussion on here a while back, and thought I posted something thoughtful, and I now have a second anus, due apparently to the thoughtlessness of my comments. We have a gay bar in Chicago (and similar ones in other cities) where people go downstairs take off their clothes and expect people to fondle them. A woman entered the bar, went downstairs and then got upset at the bar when she was groped.
Obviously this woman did not deserve to get groped, but she entered a space where it was expected. If she was penetrated against her will then someone would be doing twenty years. And we return to the tame instance of you walking into the online gay bar, getting your cock out (in the downstairs room mind you), saying they find you hot, and that they (and I haven't checked out the distance between you), have an entirely appropriate sexual fantasy about the situation.
They shared that, which is what this site is for, imagining while they came that you were gay or "straight". (I haven't even looked at these apparently hot photos yet - what is wrong with me).
If you are uncomfortable about gay guys jerking off to your images, then you need to go to tindr, or a real life club downtown, or move to a site where posting your cock online is a women's only affair.
And I will say that I think it is appalling how women are treated on this site, and you shouldn't have the constant harrassment that I assume you do. I also assume you wouldn't walk naked into a men's locker room.
Matthew