Is it gross for a man to be hitting on me?

Yes. Male sexuality in general is gross.

No. But it's pointless, right?

for you or for the man ?

Lots of normal human functions are disgusting, take bowel movements for example. 🤢 One can rearrange one's focus however to not let it be bothersome, see it in a comedic way maybe, or clinically.

No more gross than a man hitting on me. 🤷‍♀️

Why would it be gross?

Yes

I don't think so. Take it as a compliment.