Why? Why? Just why?
The feats are just a badge for a feat accomplished or content discovered.
With a "full save" you get all the badges. But you have seen none of the content and you have accomplished nuffing.
Why asking for a "full save" if you don't wanna play the game and see the content?
Having feats unlocked gives you VrelCoins, which allow you to get a head-start when starting a New Game. Some of the options also require having completed certain feats beforehand. You can still unlock feats again on a new playthrough, but it is easier to do so with the VrelCoin-funded options.
Plus, you have to play at least
2+((n-2)/2) playthroughs in order to get all of the feats (once as a male, once as a female, and the rest as a hermaphrodite), losing your virginity/ies to different named NPCs each time.
n represents the number of feats involving named NPCs taking your virginity and is currently 12 (it rises regularly as new NPCs and feats pertaining to them are added), so as of now you need to play at least 7 playthoughs to get all of the currently available feats.