Ok, so if you have sex with a person or persons, your .vag.inal. Muscles eventually become a little looser/more relaxed. My question is, will you become "tighter" if you don't have sex for a while? And if yes, then after how long (approximately) will this begin to happen? Can you ever get back to the size of how you were before you first began having sex?
Any serious help would be very much appreciated. Thank you.

Hi

Medically speaking, your vaginal muscles are determined by your size and will never change at all until you give birth for the first time. The vaginal muscles are designed to stretch to approximately 5 to 6 cm to allow the head of a baby to come through.

No, sex will not stretch you vaginal muscles and has no influence on them. The size will only change after your first baby and not before.

Hopefully this has answered you question??

There are exersizes that you can do that can actually tighten you back up. Many women do them after pregnancy. If you do go a period you will tighten back up but everyone is different. THere is no telling if you will go back to exactly how you were, but that area is very flexible and can change very easily. So to answer your question, yes, you can get tighter and not stay "stretched out"