I was looking for a picture of that kiss but haven't found one yet, but while searching Harvard-Yale football, I found this from 2016, that may be of some interest on this thread.
https://www.dailymail.co.uk/news/ar...us-rivalry-Harvard-Bulldogs-beat-Crimson.html
Butt they won! Yale students delay annual football game with Harvard by stripping off
A dozen students got butt naked on a wall at the Harvard Stadium during The Game, the yearly meetup between Harvard and Yale football teams
Students were upholding a 40-year tradition that started with one student mooning Harvard
Police delayed the game and kicked out the pranksters
By KIRI BLAKELEY FOR DAILYMAIL.COM and ASSOCIATED PRESS
PUBLISHED: 22:14 EST, 19 November 2016 | UPDATED: 03:20 EST, 20 November 2016
The famous football match-up between Harvard and Yale was briefly delayed as Yalies dropped trou and flashed the stands.
About a dozen naked or almost-naked students stood atop a wall in the century-old Harvard Stadium in Cambridge delaying the intense school rivalry until the pranksters were kicked out.
'Your daily dose of idiot courtesy Yale University,' wrote one witness on Twitter.
'Harvard-Yale football game delayed by some a**holes,' said another.
Yale students got naked at the Yale-Harvard game on Saturday in part of a 40-year tradition
Cops briefly delayed The Game, as it's known, and some witnesses on Twitter claimed they 'tackled' the butt naked students
According to a few witnesses on Twitter, police 'tackled' the butt naked Yalies.
Many other students took off just their shirts. Temperatures hovered in the mid-50s, making the lack of clothing not too un-bare-able.
The nakedness is apparently a 40-year tradition called the 'Saybrook Strip,' named after one of the Yale Residential Colleges, according to the New York Post.
The tradition holds that some students, both male and female, strip down to their underwear or even further during the football game at the end of the third quarter.
It apparently started with just one student who mooned the rival Harvard team.
The strip tease is often performed to the marching band version of The Stripper or Sweet Child O' Mine.
Exuberant students shed shirts, pants, and sometimes underpants at the stadium in Cambridge