The term "candling" has multiple meanings, but none of them refer to a sexual act that involves a person being in bed. The meanings of "candling" found in the search results are:
- A device used for nun masturbation, which is no longer used because nuns kept getting pregnant.
- The act of placing a candle wick in the tip of a penis, then covering the head with hot wax.
- To insert a candlestick up ones vagina, similar to fingering only using a candle instead of ones finger.
- A dated or outdated British term for the penis, based on shape and on the fact that it will melt when lit.
- A type of kink activity in which hot wax, usually from a candle, is dripped or poured onto a partner.
None of these meanings refer to a sexual act that involves a person being in bed. Therefore, it is unclear what "candling in bed" refers to.