Pregnancy Risk from Pre-cum and Underwear: A Comprehensive Analysis

Question
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Followup To
Question -
my boyfriend and i were makeing out and instead of haveing sex we decided it would be better to have outercourse were i had underwear on and he didnt. He pulled away befor he went so i am positive none of if cum got on me but wat are the chances of me getting pregnant by pre-cum seeping through my underwear?

In your questionu said "the sperm can swim (in a liquid medium)" did u mean they can only swim where there was liquid? and i have between a 32-39 cycle and my last period was on september 19th and we did that on october 12th. And the whole time his "thing" was just above my unedrwear line a little below my belly buton. Do you think theres a big chance of me getting pregnant by that? and when i fekt my underwhere after there was only a dime size area from my own fluids. So whats your opion on this? And can a 15 year old boy not precum?

Answer
If you have a 32-39 day cycle, I doubt that you are ovulating yet. With such an irregular cycle, there is no way for me to predict when, exactly, you ovulated.  If your skin was moist and the underwear were porous, it is possible for any sperm to have survived. (Sperm will die if deposited on a dry piece of clothing or surface). Based on your description of events, I doubt that you have anything to worry about. HOwever, if you do not get your next period, take a preganncy test a week after you miss your period. Once a boy reaches puberty, he does make sperm . Pre-cum is merely the semen that is at the tip of the penis prior to ejaculation. There are around 300,000 sperm at the tip of the penis before ejaculation. There are over 3 million sperm in a full ejaculation. YOu only need one sperm to cause a preganncy.