Sex so intense that you have to wear two pairs of underwear. A kind of sex that after you finish, you have to go to the hospital because your bits and pieces are a jumbled mess.
I had explosive sex last night that burned through my first pair of underwear and turned me into a woman
by Dr kennith noisewater October 29, 2013
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Also known as 'sex wee' or ejaculation
sex explosions can be done by both male and female, but is more apt for the male sex organs.
I was having sexual intercourse with Betty when i pulled out and did sex explosion all over her breasts

Julius made me do a sex explosion when he was teasing me
by TWIIIIIICE February 22, 2005
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