What changes will a woman's body undergo when she starts having sex regularly?

Q: Having regular sex will make any changes to a female body anything like weight gain or something?

A:

Sex is an important part and yes every one’s body reacts differently to the first time when they have sex. No a body has no changes on the outer part or in physical appearance when you have regular sex. The changes that are seen or experienced are in the inner body. Weight gain is something that depends on hormone level after having and just before having sex hormones that make you happy are released by the body and yes they can be one reason for temporary weight gain. 

Read: What changes does a womans body udergo once she starts having sex?

Are sex and weight gain related