Bad news, Casanova.  If your plan for a Valentine's Day was to give your special lady the gift of YOUR JUNK . . . she'd prefer flowers.

According to a new survey, if you had to pick one or the other, 70% of women say they'd rather get a GIFT for Valentine's Day than SEX. 

Not surprisingly, men are the opposite . . . 68% of men would rather have sex than get a Valentine's Day present.

The survey also found the top gift that both men and women want is a nice dinner out. 

The number one gift people DON'T want is anything fitness or weight-loss related.  32% of women also say it's inappropriate to give lingerie.

And if you're in a new relationship, it's too early to give them expensive jewelry or an exotic vacation.