This question attracted an unusual number of downvotes and is currently on hold as off-topic. I think it would be useful to discuss why: in my opinion there's no obvious reason to either downvote it or consider it off-topic.
Both the question and one comment mentioned safety, and sex in the cockpit has indeed been implicated in accidents before (e.g. this NTSB report). And in a wider cultural context sex and aviation are frequently linked: the mile-high club, pilots having affairs with cabin crew etc. I also find it hard to see any reasonable justification for why questions about using the toilet on aircraft are on-topic, but sex on an aircraft is off-topic.
If we are going to consider questions like this off-topic on this site, we should come to a consensus on why, so that we can be consistent and explain it clearly. I'd be especially interested in comments from the people who voted to close the question.