Here's the challenge on this domain....
You can hand reg:
TalkSex.live $70
TalkAboutSex.live $7
AboutSex.live $7
HaveSex.live $70
and so on...
I would say to try to avoid contractions (requiring apostrophe), and try checking lots of variations before you register a domain. That's what people do. It's called "Substitution". If a person can get something very similar for much cheaper, they will. "Rarity" makes for value.
I would say you will probably drop this domain unless you work very hard to sell it. The good news is that if you do end up chalking it up to experience (which most investors do), it was not too much money.