Hello, and I hope I can help you today.
First and foremost, I want to let you know that it is NOT possible to get a girl pregnant unless your penis or semen has direct contact with her vaginal opening or ejaculation takes place either inside her vagina or right at the entryway of her vagina. So "dry humping" is completely safe as far as
pregnancy and sexual disease transmission is concerned.
Sperm dies when exposed to air, so any sperm that may get on your clothes, hands, or your girlfriend's skin away from the vagina will not result in pregnancy even if it accidentally touches her private parts after-the-fact.
So I hope that you are able to be reassured by this information, and please share this with your girlfriend to ease her
anxiety as well.
I hope that I was able to adequately answer your question, and that this information was reassuring.
Best wishes, and thank you for using healthcaremagic.com,
Dr. Brown