Pre Seed Fertility

So This May Be TMI, but I’m curious lol me and mg boyfriend of 3.5 years have been trying for a baby for a year and I just purchaed Pre Seed Fertility Lubricant. I know it can get messy after intercourse after you’ve inserted it. We do a lot of oral with each other (we love foreplay). Does the preseed leak after an orgasm?? Is it safe for him to do oral on me after I’ve inserted the lubricant???