Sexual Relationships 
Sexual Health 
1. Superman
Superman would ejaculate like a shotgun or worse remember he has super breath, freeze breath and heat vision imagine what his ejaculated might do to anything that gets in his way. His trusts would be powerful enough to easily pulverise any non-super sex partner. No condom besides a kryptonite condom would work and that would kill him, you think lois could carry superman's baby 9 months in her womb? No 4 months into it super baby would kick a hole in her womb. How many of the women in superman's life got breast cancer due his constant ex-raying.
2. The Flash.
Fastest man alive, he'd litteraly be finished before she noticed. A vibrating finger may save the day though.
3.Supergirl
Having all the same powers as Superman, Supergirl could literally crush any man's penis that penetrates her. The only guy that would be OK is her cousin Superman.
4. Jean Grey
She could read your mind if you check out other girls or are thinking about other girls during sex, imagine if she asked "does this make me look fat?" The arguments this would cause lol. She could telepathically force you to have sex, make you believe you had sex or make you ejaculate in your pants by the power of her mind alone.Then there's the whole telekinesis that can punch a hole in a wall, imagine she lost control when orgasming. Not forgetting the phoenix power.
5. Wonder Woman
Wonder Woman is an amazon with superhuman strength and speed. Imagine her facesitting you, she'd crush your face as she orgasms. Death by Snu Snu.
6. The Hulk
The Hulk has a humongous penis too big for any woman. Can you imagine what he'd do to 5ft Black Widow considering his thick fingers alone are as big as her forearm.
7. Spiderman
Spiderman was bitten by a radioactive spider so has Radioactive Sperm that will give any partner radiation poisoning or vagina cancer leading to death.
8. Human Torch
He would likely fry any girl he gets it on with
9. The Thing
His Penis is made of orange rock, not sure any girl would be into that.
10. Rogue
Rogue power drains the life out of people. One kiss would leave you in hospital, imagine getting a blowjob from her. Sex with Rogue would involve an all body rubber condom.
11. Shadow Cat
Shadowcat phases through solid matter. If she lost control, phased out and rephased inside her partner he could kill him or her.
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