When you visit a website, the site gets a certain amount of information about you, but your email address is not part of it. For example, you might sign up for my newsletter, and I’ll send it to you once a week.
One of the reasons he may be tall is that both his parents are shown to be the tallest adults in the town.
Indeed, a 2013 survey by marketing firm Session M found that less than 20 percent of Tinder users state that they use the app primarily because they're "looking for a quick hookup," an answer beaten by "I'm just curious," "it's entertaining," and "looking for a relationship" (of course, the app has grown and changed a lot since 2013).
Users build profiles by importing photos and interests from their Facebook accounts, and tell the app the genders, age range, and geographic radius they want to get matches from, and then the app starts producing matches fitting the search criteria.
But just surfing web sites – and doing so with appropriate anti-malware precautions and common sense – doesn’t give them the information to email you at all.
If you haven’t provided your information, they have no real way to know who you are.