Larkin wrote this poem -- which he characterized as a "cri du cock" -- in 1943, when he was 21:
I would give all I possess
(money, keep, wallet, personal effects, and articles of dress)
To stick my tool
Up the prettiest girl in Warwick King's High School.
from Philip Larkin, The Complete Poems ed. Archue Burnett (Farrar, Straus and Giroux, 2012). A paperback version of this essential volume has an official publication date of April 2.