Leila Kalomi probably had a bundle of Vulcan joy we don't know about, too.
Err, probably not...
LEILA: I love you. I said that six years ago, and I can't seem to stop repeating myself. On Earth, you couldn't give anything of yourself. You couldn't even put your arms around me. We couldn't have anything together there.
Oh, wait... unless you mean that something happened while Spock was under the spores' influence. Hmm, in that case it's possible they got more intimately involved than '60s TV was allowed to admit. However, Enterprise
suggested that Vulcan-human hybridization would require some medical/genetic intervention (which is in keeping with what was claimed in Roddenberry's Inside Star Trek
record album from the '70s). Not to mention that there is such a thing as birth control.