Green’s Dictionary of Slang

one who prefers Bambi sex , thus bambisexuality.

1985		cited without text in G. Simes DLSS (2018) ms.
1990		Alyson Almanac 60/1: bambi-sexuality. Physical intercourse centered more about touching, kissing, and caressing than about genital sexuality [Simes:DLSS].
2012		A. Munier Big Black Bk Very Dirty Words 25: With his doe eyes and iffy sexual preferences, Michael Jackson, may he rest in peace, was the quintessential bambisexual [Simes:DLSS].

(gay) the turning of a young (otherwise homosexual) man’s fancy to (heterosexual) love [the parting of the youthful Bambi and his erstwhile pal Thumper] .

2000

Q Public June 12/1: Nick and Zach had a hard time picking their jaws up from the floor. The ‘Bambi’ effect had not yet worn off [...] these two [straight men] were given the full treatment, including blatant stares, the surreptitious feel [...].

derog. ref. to non-penetrative love-making which is restricted to caresses, kisses and genital manipulation [the nervousness of the faun Bambi].

1984		McConville & Shearlaw Slanguage of Sex 28/1: bambi Straightforward homosexual and lesbian sex which does not involve sado-masochism, bondage or domination.
1990		Vadasz & Lipp Feeling Our Way 32: ‘We don't fuck as much as we used to. [...] We’re sort of moving into Bambi sex’ [Simes:DLSS].