Want a new partner who likes ironing and poetry? Science might help you find one.

It takes a brave character to ask a new partner to take a personality test. But thanks to a study from the Oregon Research Institute, science can accurately predict whether your boyfriend will eat his vegetables or if your girlfriend is into online trolling.

First, you need to corral your crush (or your colleague) to “answer a few fun questions.” After 100 queries—you might need to break out the prosecco midway—most run-of-the-mill online personality type tests will tell you which Big Five persona your partner possesses: Openness, Conscientiousness, Extroversion, Agreeableness or Neuroticism.

The general traits for each are obvious. Conscientious characters are methodical and reliable. Neurotics are unstable and tense. But a new in-depth investigation discovered how each personality type performed in 400 mundane activities over several years. The results are eye-opening for employers and new lovers alike.

Conscientious souls, for example, spurned inoffensive activities such as reading and chewing pencils, no doubt seeing them as frivolous pastimes. They would rather, according to the study, be combing their hair or polishing their shoes instead. Extroverts are far more likely to tell dirty jokes, have tattoos, relax in hot tubs and engage in home decoration. Agreeable types are the pick of the partners: They generally sing in the shower, eat more cookies and are a whiz at housework. Open-minded souls also scored highly, if you’re looking for a lover who’s more likely to write poems and smoke dope (with one possibly influencing the other).

“A pro dating tip is to avoid neurotics,” says British Psychological Society editor Dr. Christian Jarrett, who also studied the Oregon findings. This personality type loses their temper more often and are more likely to poke fun at others. “I hope I’m never in the dating game again, but I can see advantages to thinking about a potential partner’s traits (and therefore the activities they will adore or eschew) and how they complement your own.”

So what makes someone open-minded or agreeable in the first place? “That’s a big question,” says Jarrett. “But, in short, about 50 per-cent is down to genes, and the rest to do with life experiences.” The most interesting question might not be the traits we’re born with, but what we choose to do with them.