I'm a man and I've been wearing a ladies g-string for a week.
You can't be serious, why have you been wearing women's underwear?
I like the tightness.
Well, in the end your clothing choice is your personal decision, and if you like wearing it in private that's okay. Why do you like it?
I do it since I want to feel like a woman. I even bought lingerie.
If it makes you feel happy to do this, more power to you! Gender fluidity is a lot more accepted these days, so keep on experimenting with what you love to wear.