Welcome new followers who do not quite look like porn bots.
A word of advice: If you only hit the Like heart, your blog appears to be empty and your tumblr experience will not be good. Because people will block you.
I will block you.
Get reblogging, fill your blog. This is how it's done here.
If for whatever reason you don't feel comfortable reblogging yet, literally just make one single text post saying something like "hey I'm new to tumblr and still figuring out the culture! Not a bot, pls don't block me." An empty blog is an instant report spam.