I don't feel any restrictions. Like with all things, sex is best practiced in moderation, and in terms of open or flagrant sexuality, it is generally best that one reveres a sense of shame, but even in ancient Greece it was assumed that anyone could love any gender in different capacities. Acting on those desires had social hang-ups depending on when and where one was, but there isn't really any religious or spiritual reason why it would be prohibited that really applies to modern society.

Though there were homophobic sentiments behind many of them, we do have a few stories and myths that explain why humans have such diverse expressions of sexuality and gender. Philosophers also had varying opinions that often changed over the years. Point being, there never really was a unified opinion on the subject.