Since you can see them more with the skin stretched, that sounds like Fordyce spots, which are just oil glands, and are totally normal. Some may be that, some may be hair follicles. None of it sounds like an STD. Genital warts, which is caused by HPV, usually appears in small clusters of bumps, or a couple by themselves. They aren't usually spread out all over the shaft.
While this doesn't sound like an STD, you should know that you can get certain STDs from oral sex. No one likes using a condom for oral, but it can prevent you from getting gonorrhea, chlamydia and NGU. It can significantly reduce your chances of getting syphilis and genital herpes type 1, if you don't already have hsv1 (usually causes cold sores, but can be transmitted to the genital area by oral sex).
I don't want to scare you, just inform you. :)
Google them and see if that fits.