I had sex with a woman three days ago and now some red sores have propped up on my thighs and the area above my penis. I've read around and most things do not have this short of an incubation period. Do you have any idea what is going on? Please help.
It's hard to say - it really depends on what the sores look like, whether they itch, etc. There are things you could catch that aren't in the the usual list of STDs because you can catch them in other ways. You could pick up a fungal infection, for example. Or pubic lice (crabs) or scabies. Or you could get some sort of allergic reaction to something.