can precum or cum from his penis touching mine transmit stds

[susanfisher]

[CharlieJoe]

Although the risk is low it is possible to pick up an infection this way. It's hard to give a precise figure for the risk as It depends how much precum/cum there was and which bits it came in contact with. Bacterial infections like Chlamydia can be passed on in this way more easily than others.

In any new relationship it's always good for you both to get a sexual health checkup at the beginning of the relationship and use condoms until you've both been checked out.

If you start to have sex without condoms remember to think about a good method of contraception, a sexual health clinic will be able to advise you on whats the best option for you.