Missionary sex is the most practiced sex position. However, according to a report in the NZ Herald, Brazilian researchers noted that about 21% of penile fractures occur when men try to climax. The donor may have control over the force and speed of the stabbing, but it can be dangerous if the person hits the pelvic bone without any intention of doing so.
So, practice safe sex, try different lube and make sure there is consent to what you want to try. Sex should be pleasurable for both the giver and the receiver. If the woman is not wet, how about trying some foreplay first!
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