The recapitulation theory (Ontogeny recapitulates phylogeny) is based on observation. The tendency of creatures to develop in stages that roughly correlate as t

The recapitulation theory (Ontogeny recapitulates phylogeny) is based on observation. The tendency of creatures to develop in stages that roughly correlate as to how their ancestors evolved, is not related to sexual preference. There's no evidence that homosexuality shares the same root cause(s) as to why men have nipples, theoretical or otherwise.