Having sex. Just like GoFap is to masturbate and NoFap is to (try to) not masturbate. VajFap is essentially "masturbating with a vagina" i.e. getting laid.
...."The optimal ejaculation frequency is therefore going to be lower for gofappers, higher for nofappers, and like baby bear’s porridge, juuuuuust the right amount for vajfappers."
by BurgundyChode July 27, 2017