Here is strident feminist Sheila Jeffreys talking about the topic of sex tourism in her book The Industrial Vagina: The political economy of the global sex trade:

This chapter will examine this new ‘leisure industry’, looking at the way it is being normalized, its usefulness to male buyers and to business, and the serious harms to women that are integral to this exercise of the male sex right. I will argue that sex tourism outsources women’s subordination, allowing tourists and businessmen from rich countries to access the greater desperation and degradation that can be bought in poor countries, or from trafficked women in cities like Amsterdam. It enables men in countries in which women are making advances towards equality, one aspect of which is the ability to deny men absolute sexual access, to buy women’s sexual subordination elsewhere through their greater spending power. It offers white men the advantage of being able to purchase sexual fantasies of otherness and the notion that there are women elsewhere who are desperate for their touch. (2009:130)

As you can see - sex tourism to Jeffreys consists of male consumers and female consumed. Incidentally, Jeffreys’ key argument in the book overall is that colonial imperialism and militarism are domestic violence and the subjugation of women writ large on a global and industrial scale (hence the catchy title). The solution is a Marxist-based form of feminism that will be used to stem the global forces of inequality pouring out of Wall Street (Capitalism), the Pentagon (Militarism) and the institution of marriage (Misogyny).

Later she says:

Leisure studies approaches do not generally recognize that there is anything gendered about prostitution tourism. Thus Martin Opperman, in a collection which lays out the field of ‘sex’ tourism as an area of leisure studies, comments in relation to businessmen engaged in prostitution tourism: ‘With the increase in female executives, the reversed sex roles may also become more common’ (Opperman, 1998, p. 16). There is a gap in the analysis here, since there are no men and boys dancing on stages to be chosen by ‘women’, and that needs to be explained as more than an absence of equal opportunities for women. (2009:136)

I assume this is Jeffreys’ way of saying that the female sex tourist is something of a unicorn or flying pig.

But what’s this I see in this 2016 paper on ‘Coasti slang’ and 'European sugar mamas'?

The origins of Coasti Slang must be understood as a reaction to the growing sex tourism sector on the Kenyan coast beginning in the late 1980s, when an increasing number of female sex tourists, primarily from Germany and Austria, but in later years also from Italy, France, Switzerland and the United Kingdom, engaged in short vacation liaisons with young male Kenyans working in or around the beach areas. The sex tourism industry has continued to increase over the years and has made sex one of the bestselling services along the coast. According to an article exploring young Kenyans’ perceptions of ‘European sugar mamas’, the chairman of the Mombasa Tourist Association estimates that every tenth tourist comes to Kenya comes in pursuit of sex. (Nassenstein, 2016: 2)