Depends if you are Male or female.

Females with an active sexual life will get benefits for their skin as sex is mainly emotional for them and gives them a feel good factor.

For men it's not so good as during sex and especially upon orgasm, we release alot of essential nutrients from our body, as well as create a large amount of hormones that can make our skin look bad and make us feel very tired.

A rule of thumb as a male is follow the 7 day rule. Only have sex or masterbate with 7 day breaks when our testosterone levels peak. Anymore then that is overkill and creates issues.