Well, he's a either a muff, loving jungle-hunting Nigel Thornberry explorer who doesn't mind a bit of rough and tumble in the Jungle, a Manlet, A cuckold, or otherwise, weakling, a Shota, an Australian, Or so ripped and well experienced he's sick of turning his partners into cum-socket ragdolls every danm time. Also, Orc women probably know how to cook, so it's usually the same mentality of people who fuck carribean women I guess.
Or a filth fetishist, into "Exotic" tastes, (Farts, armpit hair, pubic hair, sweat, unwashed, dirty feet, tribal attire, loincloths, leglock suffocation, leglocking, harems and all that primal non orderly shit)
Also, probably killing animals and fucking on the carcass, sometimes inside of the creatures intestines.
Infact, i'm fairly sure that's what Orcs use for condoms.
So you know, kill a monster, use it's guts to fuck your orc.