Here’s my approach to this, as a dude:

I mean, really I don’t have a broad preference for or against bush at all…

… but, if you want me to smooch things down there, please tidy up a bit.

I just don’t like having a mouth full of hair.

Don’t worry, I will tidy up too, for the reverse scenario, if partner also dislikes mouthful of hair, and! … this also applies to my facial hair… I’m not that attached to it, and it will grow back, if you want to smooch my face but don’t like the beard/stache.

Maybe I am lucky in that I at least I think I look decent both with or without a beard/stache.

This is to me completely fair and reciprocal, and … really is not that conplicated.