So I've been with my boyfriend for 2 years now and we've done only oral and anal up to now because we want to save vaginal sex for after marriage. We tend to always use a condom (I'd say about 9.8/10 times, so a lot more times than not) and we're both each other's firsts in dating and relationship-wise. Both of us are committed to each other and have promised to stay with each other through good and bad times since we know communication, trust, respect, and compromise are keys to any relationship (and trust me, my depression has made me break down right in front of him and try to push him away, yet he still stays with me and all this anxiety I have). We're both STD free and university students (which was where we first met btw). Whenever we do anal, he relaxes me by stimulation and then prepares me with saliva since we don't have ready access to actual lube atm (plan to buy it later on in the future when we get an apartment to ourselves since we currently live on campus and with or without roommates from year to year). He enters me and it feels great and all, but here are some questions that I just want some confirmation to since I've done research online (so relatively credible, but not entirely since it's the internet lol) and am pretty much certain by the amount of research I've done that what I know now is all good, but it never hurts to ask more people for their inputs and possible additional knowledge that I didn't up on online!

1. Can you get STDs from anal if both partners have none? (Online says no for the general vaginal sex, but I was wondering if it was different for anal due to possible infections from tears in the butt? My mother has me doubting myself because she said that people can get STDs from anal, though I know the internet research cares to differ. But now it's left me questioning and asking for your guys' input!)

2. In your opinion, is saliva an okay substitute for lube atm? The condoms we get are slightly lubricated already as well. (This part is going to sound quite childish on both of us, but since it's both of our first times dating and being quite new to it all, we still are quite shy when we go out to buy condoms. Most of the time, I end up making him buy it and we switch off on 'I pay for a box and then he pays for the next' and so on to make the money burden relatively fair. Yes, I feel bad for always making him buy the protection and I plan to improve in the future by playing my part by buying them too since it's probably embarrassing for him too. In addition, I've got to grow up in maturity as well, so no worries. I see it as a personal growth thing to work on.)

3. Is anal even okay to do instead of vaginal sex over a long period of time? (Gonna sound very childish again here, sorry, but the reason for anal and not the home run is because we're both university undergrad 3rd year students, still working hard for our respective career paths, and would rather prefer to decrease the chances of me getting pregnant as much as possible. Yes, we are prepared for the possibility of getting pregnant and are both prepared to own up to the responsibilities, however, we'd like to avoid that from happening by taking precautions and avoiding possible semen to vagina contact. However, is anal even okay to do over and over again? Research I've done online says yes as long as there's protection, but once again the doubts from question 1 keep popping up and I'd like your guys' insights!)

Sorry for such a long post and probably being such a newbie to this 'game' called love, but I would love to hear everyone's helpful insights on the matter! If you have any additional information on the matter that doesn't somehow relate to my questions, feel free to post them too because any and all insight is extremely appreciated! I may even edit this post if any additional questions pop up and I will make note of the edits for easy visibility. Thank you for reading (/possibly helping) and I hope you all have a wonderful day!