squidpants

so i was walking down the street the other day and passed these two women who were talking to each other, and one lady said "i am having sex for fish". which confused me. she didn't laugh when saying it, but she didn't sound angry either. so i am wondering what the hell she was talking about? i of course immediately thought "i have some bass" but i mispronounced it in my thoughts, like base, so i didn't say that. but is she going on a date with some rich dude because he's going to take her to a nice restaurant so she can get some fish, and then she'll have sex with him? is she having sex with an enviornmentalist? i don't understand this statement. if you have any ideas about it, email me. i need some suggestions.