20+ years ago I knew a high school coach who had a good looking sophomore student 9 years his junior in his classes. She pursued him for 3 years. On her 18th birthday he let her consummate the deal and they got married shortly after. She went to college, had kids and as far as I know they’re still married.
High school is 25 years ago for me. We had a coach who slept with twin sisters, a french teacher who flew to France and eloped with a student and a principal who left and subsequently married a student. There was probably more. Again no internet or texting back then.