Probably the most ridiculous thing about WGs. You can literally fuck a girls's throat and spurt your man batter at her tonsils, but god forbid she's actually have your tongue in her mouth. Equally, she'll sometimes be happy to put her tongue on/in your arsehole, but won't put it in your mouth. Many won't even allow your lips to touch hers-though they're fine with twisting and turning so you end up sucking her chin or kissing her cheek
, yet they're happy for your mouth to touch the most sensitive (& prone to infection) part of her anatomy.
Just insanity. The mysteries of woman.