I usually wait a few minutes after getting out of the shower before applying frags OR deodorants. Your body heats up a bit in the shower, and it first has to cool down again. Doing so, you will sweat a bit more. You will notice a difference whether you
a) Get out of the shower, dry yourself and then apply body lotion
b) Get out of the shower, dry yourself, wait 20 mins and then apply body lotion
Your skin will take on the body lotion much better if you wait a bit. BTW, applying body lotion is something you should probably consider if you want the frags to last longer on your skin. Or use some vaseline!