Jessica White was ready to spill during a chat with TMZ … and she didn’t hold back on a pretty controversial take — including one thing she says is totally fine for women to do, but a hard no for men.

Check out the clip … we caught up with Jessica Tuesday at the Gurus Magazine x Morgan Publicity luncheon for Endometriosis Awareness Month in Beverly Hills … and without missing a beat, she said it’s perfectly OK for women to be bisexual, but when it comes to guys? Not so much.

It’s definitely a spicy opinion — and she doubles down by explaining exactly why she feels that way … so you’ll want to watch the full clip.