People change and adapt when they’re in a relationship—and not usually in ways that make them more unique. Studies suggest that over time, romantic partners can become more similar in subtle ways. Younger couples tend to have similar levels of health the longer they’ve been together, and couples may even develop similar facial features—by employing the same facial muscles out of unintentional mimicry—over time.

The same phenomenon may also happen on the plate. A new study published in the journal Appetite suggests that couples may develop more similar food tastes the longer they’re together.

In the study, researchers from Poland and Germany looked at 100 couples who had been together for anywhere from three months to 45 years. They tested everyone’s smell and taste preferences by asking them to sniff and rate several scents, like rose, eucalyptus, smoked meat and leather. The researchers then spritzed a series of flavors on the everyone’s tongues: sweet, salty, sour, umami and bitter.

The longer a couple had been together, the more likely they were to share the same preferences for smell and taste. Interestingly, how happy they were in their relationship did not affect this trend.