Hell, my female cat is such a slut that even though she’s been spayed, she’ll present herself to any male human who happens to be around her. (In addition to being a slut, she’s also into bestiality, apparently). When a man comes to visit us, or if we have a male service person come around, she will make a real pest of herself. If a man sits down in her presence, she will promptly jump in his lap and present her genital region to him. This can be a bit awkward for the humans involved.
I’ve had a few female cats in heat, mostly because I adopted them and they promptly developed the feline equivalent of kennel cough, and so couldn’t be operated on until they recovered. Female cats in heat will seek out male cats. They’ll seek out male humans. They’ll back up against anything that vaguely resembles a penis. They’ve got an itch that they NEED to get scratched, and they are not picky about how they go about getting it scratched.
Before I had my first cat fixed she would run up to me and plant herself directly in my path with her tail to the side. She wouldn’t move even if I stepped on her tail.