Recall that the first relatively stable BRIDGES were likely fallen trees crossing a gap, a ravine (valley-shaped with fluid flow within), or gorge (as in gorgeous). As clearly depicted by the elements, a horizontal「woody」that is「swallowed completely, engulfed」with「juxtaposed orifices within spread legs, vaginas」will serve to BRIDGE THE GAP between them, that is, by skillfully positioning a two-headed dildo designed for two-person use, a tool that was quite commonly enjoyed in dynastic China (see erotic art, and carved Chinese dildoes as museum pieces). Many, if not most, anthropologists understand that bonobos today exhibit the behavior of early humans, and modern humans, too:
　「Sometimes females would rather GG-rub [genital-to-genital] with each other than copulate with a male. Parish filmed a 15-minute scene at a bonobo colony at the San Diego Wild Animal Park in which a male, Vernon, repeatedly solicited two females, Lisa and Loretta. Again and again he arched his back and displayed his erect penis—the bonobo request for sex. The females moved away from him, tactfully turning him down until they crept behind a tree and GG-rubbed with each other.」
　　[　https://www.discovermagazine.com/mind/casual-sex-play-common-among-bonobos 2023-05-14　]　
　Nonetheless, in later ages, bridges in the Orient traditionally were not straight flat-level, but rather formed a「curved」arch over a river or chasm (convex curves relative to the Earth's gravity are stronger engineering shapes for bearing weight, generally, and also why many stone doorways are curved in this manner). A「woody with tender fresh-looking orifice(s)」and the lower element as「spread legs」straddling a fluid flow of some sort also would BRIDGE THE GAP between two participants. Perhaps depicting bridge pylons creating an「orifice」through which barge and other traffic may pass back and forth…use your imagination. Related glyph (圯) also describes a BRIDGE: a「snake-like appendage with soil」on one side also forms a BRIDGE-like structure.
　The PONS (Latin for「bridge」) is the part of the human brain responsible for controlling involuntary actions, and is speculated to be the site where dreams are generated during sleep…again, use your imagination.

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: bridge
Japanese: pons, pons Varolii, pontine, part of the brain stem, bridge, building, cross-linking, girder, covered passageway connecting the backstage to the noh stage
Unihan extended: bridge; beam, crosspiece
EDRDG: bridge

Used within names (nanori)
ばせ