Not TTC, but not preventing necessarily...

For those using this app as a way to prevent pregnancy with no other bc, do you allow your SO to cum inside you while on "safe days"? I have a very regular cycle since I was a teen, and my cycle is 26 days to the day. So I feel comfortable enough having my SO pull out only during my fertile week. We've been doing this for a couple months now. Does anyone else do this? I know it's hard to answer if your cycle is all over the place, but just curious to know what others do and if I am totally crazy lol.